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	diff --git a/herwig-bootstrap b/herwig-bootstrap
	--- a/herwig-bootstrap
	+++ b/herwig-bootstrap
	@@ -1,1378 +1,1383 @@
	#!/usr/bin/env python
	import subprocess
	import sys, os, errno, platform, shutil
	import urllib2, ssl
	import tarfile
	from optparse import OptionParser, OptionGroup
	from optparse import SUPPRESS_HELP as NOHELP
	from time import sleep

	if platform.system() == 'Darwin':
	default_cc = os.getenv('CC', '/usr/bin/clang')
	default_cxx = os.getenv('CXX', '/usr/bin/clang++')
	default_fc = os.getenv('FC', None)
	else:
	default_cc = os.getenv('CC', 'gcc')
	default_cxx = os.getenv('CXX', 'g++')
	default_fc = os.getenv('FC', 'gfortran')

	# from http://stackoverflow.com/a/377028
	def which(program):
	import os
	def is_exe(fpath):
	return os.path.isfile(fpath) and os.access(fpath, os.X_OK)

	fpath, fname = os.path.split(program)
	if fpath:
	if is_exe(program):
	return program
	else:
	for path in os.environ["PATH"].split(os.pathsep):
	path = path.strip('"')
	exe_file = os.path.join(path, program)
	if is_exe(exe_file):
	return exe_file

	return None



	parser = OptionParser(usage='Usage: %prog [options] DEST_DIR\n'
	' %prog --help')

	without_helptext = """
	can optionally be satisfied with pre-existing installations. Specifying the PATH to an
	existing installation will prevent a local build.
	Each --with-FOO option has a corresponding --without-FOO,
	to disable that package completely.
	We can't help with build errors arising from use of --with and --without!
	"""

	parser_core = OptionGroup(parser,"Override main dependencies",
	"The main dependencies for Herwig"+without_helptext)

	parser_nlo = OptionGroup(parser,"Override NLO dependencies",
	"The dependencies on NLO providers."+without_helptext)

	parser_scm = OptionGroup(parser,"Source code repositories (for developers)",
	"Some dependencies are also available as "
	"direct source code checkouts. "
	"Default repo URLs are already provided, you only "
	"need to use the --foo-repo= options to change the defaults.")

	parser_versions = OptionGroup(parser, "Code versions",
	"Change the default version of the installation.")

	parser_misc = OptionGroup(parser,"Miscellaneous options",
	"Options for special use cases, not required for a regular build.")

	parser.add_option_group(parser_core)
	parser.add_option_group(parser_nlo)
	parser.add_option_group(parser_versions)
	parser.add_option_group(parser_scm)
	parser.add_option_group(parser_misc)

	# src directory
	parser_misc.add_option("--src-dir",
	metavar='PATH',
	type='string',
	default="",
	dest='src_dir',
	help='Separate the source/build directory. Default is DEST_DIR/src.')

	# function to set up the standard flags for a program
	def setUpFlags(parser,program,version) :
	parser.add_option("--with-"+program ,
	dest=program+'_loc',
	metavar='PATH',
	default=None,
	help="")
	parser.add_option("--without-"+program,
	action='store_false',
	dest=program,
	default=True,
	help=NOHELP)
	if version:
	parser_versions.add_option("--"+program+"-version",
	metavar='VER',
	type='string',
	default=version,
	dest=program+"_ver",
	help="[%default]")
	# compiler building
	parser.add_option("--build-gcc",
	action='store_true' ,
	dest="gcc",
	default=False,
	help="Build a local copy of the gcc compilers to use for the rest of bootstrap.")

	parser_versions.add_option("--gcc-version",
	metavar='VER',
	type='string',
	default='6.2.0',
	dest="gcc_ver",
	help="[%default]")

	# C++ 11
	parser.add_option("--c++11-flag",
	metavar="'...'",
	type='string',
	dest="cxx11",
	default='-std=c++11',
	help="Compiler flag to enable C++11 compatibility. ['%default']")

	# gengetopt
	parser_misc.add_option("--build-gengetopt",
	action='store_true' ,
	dest='gengetopt',
	default=False,
	help="Always build a local version of gengetopt instead of automatic detection.")

	# flags for boost
	setUpFlags(parser_core,"boost","1.62.0")
	parser_misc.add_option("--boost-all",
	action='store_false',
	dest="boost_minimal",
	default=True,
	help='Install all the boost libaries, including those not required by Herwig.')
	# flags for gsl
	setUpFlags(parser_core,"gsl","2.2.1")
	# flags for fastjet
	setUpFlags(parser_core,"fastjet","3.2.1")
	# flags for hepmc
	setUpFlags(parser_core,"hepmc","2.06.09")
	# flags for lhapdf
	setUpFlags(parser_core,"lhapdf","6.1.6")
	parser_misc.add_option("--add-pdf",
	metavar='PDF',
	action='append',
	dest="pdfs",
	default=["MMHT2014lo68cl","MMHT2014nlo68cl"],
	help='Add a PDF to the defaults %default')
	# flags for yoda
	setUpFlags(parser_core,"yoda","1.6.5")
	parser_scm.add_option("--yoda-hg",
	action='store_true',
	dest="yoda_hg",
	default=False,
	help='')
	parser_scm.add_option("--yoda-repo",
	metavar='URL',
	type='string',
	default="https://yoda.hepforge.org/hg/yoda",
	dest='yoda_repo',
	help='[%default]')
	# flags for rivet
	setUpFlags(parser_core,"rivet","2.5.2")
	parser_scm.add_option("--rivet-hg",
	action='store_true',
	dest="rivet_hg",
	default=False,
	help='')
	parser_scm.add_option("--rivet-repo",
	metavar='URL',
	type='string',
	default="https://rivet.hepforge.org/hg/rivet",
	dest='rivet_repo',
	help='[%default]')
	# flags for thepeg
	setUpFlags(parser_core,"thepeg","2.1.0")
	parser_scm.add_option("--thepeg-hg",
	action='store_true',
	dest="thepeg_hg",
	default=False,
	help='')
	parser_scm.add_option("--thepeg-repo",
	metavar='URL',
	type='string',
	default="https://thepeg.hepforge.org/hg/ThePEG",
	dest='thepeg_repo',
	help='[%default]')

	# flags for herwig
	setUpFlags(parser_core,"herwig","7.1.0")
	parser_scm.add_option("--herwig-hg",
	action='store_true',
	dest="herwig_hg",
	default=False,
	help='')
	parser_scm.add_option("--herwig-repo",
	metavar='URL',
	type='string',
	default="https://herwig.hepforge.org/hg/herwig",
	dest='herwig_repo',
	help=' [%default]')
	# madgraph
	setUpFlags(parser_nlo,"madgraph","2.5.1")
	parser_scm.add_option("--madgraph-bzr",
	action='store_true',
	dest="madgraph_bzr",
	default=False,
	help='')
	parser_scm.add_option("--madgraph-repo",
	metavar='URL',
	type='string',
	default="lp:~matchboxteam/mg5amcnlo/matchbox_output",
	dest='madgraph_repo',
	help='[%default]')
	# flags for njet
	setUpFlags(parser_nlo,"njet","2.0.0")
	# flags for vbfnlo
	setUpFlags(parser_nlo,"vbfnlo","3.0.0beta2")
	parser_misc.add_option("--vbfnlo-processes",
	metavar='PROCS',
	type='string',
	default="vbf,hjjj",
	dest='vbfnlo_processes',
	help='The processes for VBFNLO [%default]')
	# flags for GoSam
	setUpFlags(parser_nlo,"gosam","")
	# flags for OpenLoops
	setUpFlags(parser_nlo,"openloops","public")
	parser_scm.add_option("--openloops-repo",
	metavar='URL',
	type='string',
	default="http://openloops.hepforge.org/svn/OpenLoops/branches",
	dest='openloops_repo',
	help='[%default]')
	parser_misc.add_option("--openloops-processes",
	metavar='PROCS',
	type='string',
	default="ppll",
	dest='openloops_processes',
	help='The processes for OpenLoops [%default]')
	# flags for hjets
	setUpFlags(parser_nlo,"hjets","1.1")
	parser_scm.add_option("--hjets-hg",
	action='store_true',
	dest="hjets_hg",
	default=False,
	help='')
	parser_scm.add_option("--hjets-repo",
	metavar='URL',
	type='string',
	default="https://hjets.hepforge.org/hg/hjets",
	dest='hjets_repo',
	help='[%default]')
	# flags for porgrans needed by evtgen
	### setUpFlags(parser_core,"tauola","1.1.5")
	### setUpFlags(parser_core,"photos","3.61")
	setUpFlags(parser_core,"pythia","8.186")
	setUpFlags(parser_core,"evtgen","R01-06-00")

	# no of cores
	try:
	from multiprocessing import cpu_count
	ncore = max(cpu_count()-1, 1)
	del cpu_count
	except:
	ncore = 1

	parser.add_option("-j",
	type='int',
	metavar='N',
	default=ncore,
	dest="ncore",
	help="Use N cores in make -j to speed up compilation. [%default]")

	del ncore

	# get the options and locations
	opts, install_dir = parser.parse_args()

	if len(install_dir) != 1:
	parser.print_usage(sys.stderr)
	exit(1)
	install_dir = install_dir[0]

	# enable C++11
	default_cxx += " %s" % opts.cxx11

	# gengetopt is always needed for Herwig hg build
	opts.herwig_hg = True # TODO AFTER RELEASE
	if opts.herwig_hg and which('gengetopt') is None:
	opts.gengetopt = True

	if platform.system() == 'Darwin':
	# problem with dd_real from libqd
	opts.njet = False
	sys.stderr.write("* OS X: disabling NJet (need more dd_real overloads for math.h) *\n")

	if opts.gcc:
	sys.stderr.write("""
	*********************************************************
	*
	* Self-building the compilers is not supported on OS X.
	*
	* Set FC to a Fortran compiler you have installed from
	* another source (e.g. MacPorts, Fink or Homebrew) and
	* rerun bootstrap without '--build-gcc'.
	*
	*********************************************************

	""")
	sys.exit(1)

	if default_fc is None:
	sys.stderr.write("""
	*********************************************************
	*
	* Set FC to a Fortran compiler you have installed from
	* another source (e.g. MacPorts, Fink or Homebrew).
	*
	*********************************************************

	""")
	sys.exit(1)

	if not opts.gcc:
	print """
	*********************************************************
	* Using CC="%s" CXX="%s" FC="%s".
	* Set these environment variables to change compilers.
	*********************************************************

	""" % (default_cc,default_cxx,default_fc)

	else:
	print """
	*********************************************************************
	* Using self-installed CC, CXX and FC. To use other compilers,
	* remove --build-gcc and optionally set these 3 environment variables.
	*********************************************************************

	"""
	sleep(1)



	# set the base directory
	current_dir=os.getcwd()

	base_dir=os.path.join(current_dir,install_dir)
	if not os.path.isdir(base_dir):
	os.mkdir(base_dir)

	opt_dir = os.path.join(base_dir,'opt')
	if not os.path.isdir(opt_dir):
	os.mkdir(opt_dir)

	if not opts.src_dir:
	src_dir = os.path.join(base_dir,'src')
	else:
	src_dir = os.path.join(current_dir,opts.src_dir)
	if not os.path.isdir(src_dir):
	os.mkdir(src_dir)

	# store the used command line for easy repetition later
	current_cmdline = []
	current_cmdline.append('CC="%s"' % default_cc)
	current_cmdline.append('CXX="%s"' % default_cxx)
	current_cmdline.append('FC="%s"' % default_fc)
	current_cmdline += sys.argv

	with open(os.path.join(src_dir,'herwig_bootstrap_last_cmd'),'w') as f:
	f.write(' '.join(current_cmdline)+'\n')

	del current_cmdline

	os.chdir(src_dir)


	# set the environment variables
	bin_dir = os.path.join(base_dir,'bin')
	try:
	os.environ['PATH'] = os.pathsep.join([bin_dir, os.environ['PATH']])
	except KeyError:
	os.environ['PATH'] = bin_dir


	ld_env_name = 'LD_LIBRARY_PATH' if platform.system() != 'Darwin' else 'DYLD_LIBRARY_PATH'
	libpaths = [os.path.join(base_dir,'lib')]
	if platform.system() != 'Darwin':
	libpaths.append(os.path.join(base_dir,'lib64'))
	lib_dirs = os.pathsep.join(libpaths)
	try:
	os.environ[ld_env_name] = os.pathsep.join([lib_dirs, os.environ[ld_env_name]])
	except KeyError:
	os.environ[ld_env_name] = lib_dirs


	python_path = os.pathsep.join([os.path.join(base_dir,'lib64','python'+sys.version[:3],'site-packages'),
	os.path.join(base_dir,'lib', 'python'+sys.version[:3],'site-packages')])
	try:
	os.environ['PYTHONPATH'] = os.pathsep.join([python_path, os.environ['PYTHONPATH']])
	except KeyError:
	os.environ['PYTHONPATH'] = python_path


	# storage of prefix info for individual packages
	class Prefixes(dict):
	# return None instead of raising KeyError for unknown package name
	def __missing__(self, key):
	return None
	prefix = Prefixes()

	def check_call(arglist):
	print ' '.join(arglist)
	subprocess.check_call(arglist)

	# checkout
	def checkout( location, base, version, repo, branch, repo_type='hg', revision=None) :
	os.chdir(location)
	if repo_type == 'hg':
	directory=base
	if version:
	directory += "-"+version
	if not os.path.isdir(directory):
	check_call(["hg","clone",repo,directory])
	else:
	check_call(["hg","pull","-R",directory,repo])
	os.chdir(os.path.join(location,directory))
	if revision:
	check_call(["hg","up","-r",revision])
	else:
	check_call(["hg","up",branch])
	if os.access('Makefile',os.R_OK):
	print 'Makefile exists, skipping autoreconf'
	else:
	check_call(["autoreconf","-vi"])
	elif repo_type == "bzr":
	check_call(["bzr","co",repo,base])
	elif repo_type == "svn":
	if revision:
	check_call(["svn","checkout",repo+"/"+branch,base,"-r",revision])
	else:
	check_call(["svn","checkout",repo+"/"+branch,base])
	os.chdir(os.path.join(location,base))
	else:
	sys.stderr.write('Only supports checkout from hg,svn or bzr\n')
	exit(1)

	def download_only(url_base,tar_name,distinct=False) :
	if os.access(tar_name, os.R_OK):
	print 'Found existing %s' % tar_name
	return

	if distinct:
	program_url = url_base
	else:
	program_url = '%s/%s' % (url_base,tar_name)
	print "Download %s as %s" % (program_url,tar_name)

	req_headers = {
	'User-Agent' : 'herwig-bootstrap',
	'Accept' : '/'
	}
	request = urllib2.Request(program_url, headers=req_headers)
	try:
	try:
	context = ssl.create_default_context()
	response = urllib2.urlopen(request, context=context)
	except AttributeError:
	response = urllib2.urlopen(request)
	except urllib2.HTTPError as e:
	try:
	reason = e.reason
	except:
	reason = ''
	sys.stderr.write('Remote server returned error code %s: %s\n' % (e.code, reason))
	exit(1)
	except urllib2.URLError as e:
	sys.stderr.write('Could not reach server: %s\n' % e.reason)
	exit(1)

	with open(tar_name,'w') as f:
	f.write(response.read())

	def download(url_base,tar_name,args=[],distinct=False) :
	download_only(url_base,tar_name,distinct)
	tar = tarfile.open(tar_name,'r')
	lastfile = tar.getnames()[-1]
	if os.access(lastfile, os.R_OK):
	print 'Extracted %s exists already' % lastfile.split('/')[0]
	else:
	print "Extract %s" % tar_name
	tar.extractall()
	tar.close()

	def compile(config_flags=[]) :
	if os.access('Makefile',os.R_OK):
	print 'Makefile exists, skipping configure'
	else:
	flags = ["./configure","--prefix="+base_dir]
	flags += config_flags
	check_call(flags)
	check_call(["make","-s","-j%s" % opts.ncore])

	# TODO ?? skip here if some file already exists in /lib or /bin ??
	check_call(["make","-s","install"])
	os.chdir(src_dir)

	def downloadAndCompile(url_base,base_name,suffix,config_flags) :
	download(url_base,base_name+suffix)
	os.chdir(os.path.join(src_dir,base_name))
	compile(config_flags)

	def deletelibtool() :
	os.chdir(base_dir)
	for directory in ["lib","lib64","lib32"] :
	full_path = os.path.join(base_dir,directory)
	if os.path.isdir(full_path) :
	check_call(["find",full_path,"-name","*.la","-delete"])

	GCC_SUFFIX = '-herwig-%s' % opts.gcc_ver

	def unsupported_gcc():
	sys.stderr.write("Unsupported gcc version %s requested.\n" % opts.gcc_ver)
	sys.exit(1)

	def patch(project,patchtext):
	os.chdir(os.path.join(src_dir,project))
	print 'patching in', os.getcwd()
	p = subprocess.Popen(['patch','-p1'], stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE)
	stdout_data, stderr_data = p.communicate(input=patchtext)
	print stdout_data
	print stderr_data
	if p.returncode != 0:
	sys.stderr.write('patch failed\n')

	def buildgcc() :
	# build gmp with --enable-fat to allow portability
	# --enable-fat currently broken on Mac, see
	# https://gmplib.org/repo/gmp/raw-rev/1fab0adc5ff7
	gmp_fatoption = ['--enable-fat']
	if platform.system() == 'Darwin':
	gmp_fatoption = []
	# build gmp
	if marker_is_missing('gmp'):
	downloadAndCompile('https://gmplib.org/download/gmp',"gmp-6.1.1",".tar.bz2",gmp_fatoption)
	prefix['gmp']=base_dir
	mark_as_done('gmp')
	# build mpfr
	if marker_is_missing('mpfr'):
	downloadAndCompile('http://mpfr.loria.fr/mpfr-3.1.5',"mpfr-3.1.5",".tar.bz2",["--with-gmp="+base_dir])
	prefix['mpfr']=base_dir
	mark_as_done('mpfr')
	# build mpc
	if marker_is_missing('mpc'):
	downloadAndCompile("http://www.multiprecision.org/mpc/download","mpc-1.0.3",".tar.gz",["--with-gmp="+base_dir,"--with-mpfr="+base_dir])
	prefix['mpc']=base_dir
	mark_as_done('mpc')
	# gcc
	download('http://nl.mirror.babylon.network/gcc/releases/gcc-'+opts.gcc_ver,
	"gcc-"+opts.gcc_ver+".tar.bz2")

	os.chdir("gcc-%s" % opts.gcc_ver)

	obj_path=os.path.join(src_dir,"gcc-build")
	if not os.access(obj_path, os.R_OK):
	os.mkdir(obj_path)
	os.chdir(obj_path)
	else:
	os.chdir(obj_path)
	# don't use check_call here, the command may not always complete OK
	subprocess.call(["make","distclean"])
	try:
	gcc_version = map(int,opts.gcc_ver.split(".")[:2])
	except:
	sys.stderr.write('Unknown gcc version format. Expecting "N.N.N".\n')
	exit(1)
	flags=["../gcc-"+opts.gcc_ver+"/configure",
	"--prefix="+base_dir,
	"--program-suffix="+GCC_SUFFIX,
	"--disable-multilib"]
	if gcc_version[0] <= 3:
	unsupported_gcc()
	elif gcc_version[0] >= 4:
	if gcc_version[0] == 4 and gcc_version[1] < 8:
	unsupported_gcc()
	else:
	flags.append("--enable-languages=c,c++,fortran")
	flags.append("--with-gmp="+base_dir)
	flags.append("--with-mpfr="+base_dir)
	if gcc_version[0] >= 4:
	flags.append("--with-mpc="+base_dir)
	# if gcc_version[0] == 4 and gcc_version[1] == 9 and platform.system() == 'Darwin':
	# flags.append('--with-build-config=bootstrap-debug')

	check_call(flags)
	check_call(["make","-s","-j"+str(opts.ncore)])
	check_call(["make","-s","install"])
	deletelibtool()
	os.chdir(src_dir)

	def lockfile_path(name,version):
	if version:
	version = '_' + version.replace('.','_')
	path = os.path.join(src_dir,
	'herwig_bootstrap_%s%s_done' % (name,version))
	return path

	def mark_as_done(name,version=''):
	lfpath = lockfile_path(name,version)
	with open(lfpath, 'w') as f:
	f.write('%s\n' % prefix[name])

	def build_needed(name,version=''):
	alternate_path = getattr(opts,'%s_loc' % name,False)
	if alternate_path:
	print 'Alternative given for %s.\nUsing %s' % (name, alternate_path)
	prefix[name] = alternate_path
	return False

	cmdline_flag_set = getattr(opts,name,False) # default to false if not found

	if cmdline_flag_set:
	return marker_is_missing(name,version)
	else:
	return False

	def marker_is_missing(name,version=''):
	lfpath = lockfile_path(name,version)
	try:
	with open(lfpath) as f:
	prefixpath = f.readline().rstrip()
	except EnvironmentError:
	return True
	else:
	print 'Marker file for %s%s exists in src/, skipping build,' % (name,version)
	print ' using prefix=%s.' % prefixpath
	prefix[name] = prefixpath
	return False


	# download and compile gcc
	if build_needed('gcc'):
	buildgcc()
	mark_as_done('gcc')

	if opts.gcc:
	default_cc = os.path.join(base_dir,'bin','gcc%s' % GCC_SUFFIX)
	default_cxx = os.path.join(base_dir,'bin','g++%s' % GCC_SUFFIX)
	default_cxx += " %s" % opts.cxx11
	default_fc = os.path.join(base_dir,'bin','gfortran%s' % GCC_SUFFIX)

	os.environ['CC'] = default_cc
	os.environ['CXX'] = default_cxx
	os.environ['FC'] = default_fc
	os.environ['F77'] = default_fc

	if build_needed('gengetopt'):
	tmp_ncore=opts.ncore
	opts.ncore=1
	downloadAndCompile("ftp://ftp.gnu.org/gnu/gengetopt/",
	"gengetopt-2.22.6",".tar.gz",[])
	opts.ncore=tmp_ncore
	mark_as_done('gengetopt')


	# install boost if required
	if build_needed('boost'):
	boost_ver2=opts.boost_ver.replace(".","_")
	boost_base = "boost_"+ boost_ver2
	download("http://sourceforge.net/projects/boost/files/boost/"+ opts.boost_ver,
	boost_base+".tar.bz2")
	os.chdir(os.path.join(src_dir,boost_base))

	# make sure we use our own compiler
	# this works as long as default_cxx is sufficiently gcc-like
	# need to separate out the cxxflag addition
	boost_cxx = ' '.join(default_cxx.split(' ')[:-1])
	boost_cxxflags = opts.cxx11

	with open('tools/build/src/user-config.jam','w') as f:
	f.write('using gcc : : "%s" : <cxxflags>"%s" ;\n'
	% (boost_cxx, boost_cxxflags))

	if opts.boost_minimal:
	check_call(["./bootstrap.sh","--prefix="+base_dir,'threading=multi',"--with-libraries=filesystem,system,test"])
	else :
	check_call(["./bootstrap.sh","--prefix="+base_dir,'threading=multi'])
	check_call(["./b2","--layout=tagged","install","-j"+str(opts.ncore)])
	os.chdir(src_dir)

	# on OS X, write helper script
	if platform.system() == 'Darwin':
	helpername='./boost-osx-path-fix'
	with open(helpername,'w') as f:
	f.write(
	"""\
	#!/bin/bash
	for i in %s/lib/libboost.dylib
	do
	install_name_tool -id $i $i \|\| true
	if [ $(basename $i) == 'libboost_filesystem-mt.dylib' ]; then
	install_name_tool -change libboost_system-mt.dylib $(dirname $i)/libboost_system-mt.dylib $i \|\| true
	fi
	done
	""" % base_dir)
	os.chmod(helpername,0755)
	check_call([helpername])

	prefix['boost']=base_dir
	mark_as_done('boost')


	# install gsl if required
	if build_needed('gsl'):
	downloadAndCompile("http://www.mirrorservice.org/sites/ftp.gnu.org/gnu/gsl",
	"gsl-"+opts.gsl_ver,".tar.gz",
	[])
	prefix['gsl']=base_dir
	mark_as_done('gsl')


	# install fastjet if required
	if build_needed('fastjet'):
	downloadAndCompile("http://fastjet.fr/repo",
	"fastjet-"+opts.fastjet_ver,".tar.gz",
	["--enable-allcxxplugins"])
	prefix['fastjet']=base_dir
	mark_as_done('fastjet')


	# install hepmc if needed
	if build_needed('hepmc'):
	downloadAndCompile("http://lcgapp.cern.ch/project/simu/HepMC/download",
	"HepMC-"+opts.hepmc_ver,".tar.gz",
	["--with-momentum=GEV","--with-length=MM"])
	prefix['hepmc']=base_dir
	mark_as_done('hepmc')

	# install lhapdf if needed
	if build_needed('lhapdf'):
	args=[]
	if prefix['boost']:
	args.append("--with-boost="+prefix['boost'])
	download("http://www.hepforge.org/archive/lhapdf",
	"LHAPDF-"+opts.lhapdf_ver+".tar.gz")
	patch("LHAPDF-"+opts.lhapdf_ver,
	"""\
	diff -r 170b3a75d236 -r 3afd802d43f9 wrappers/python/Makefile.in
	--- a/wrappers/python/Makefile.in Wed Sep 28 16:52:54 2016 +0100
	+++ b/wrappers/python/Makefile.in Mon Nov 21 15:55:49 2016 +0100
	@@ -268,3 +268,3 @@
	FIXSOURCES = $(EXTRA_DIST)
	-@WITH_PYTHON_TRUE@PYEXT_ENV = CC=$(CC) CXX=$(CXX)
	+@WITH_PYTHON_TRUE@PYEXT_ENV = CC="$(CC)" CXX="$(CXX)"
	all: all-am
	""")
	# add "" to PY_ENV in wrappers/python/Makefile
	compile(args)
	for pdf in opts.pdfs :
	lhapdftool = os.path.join(base_dir,'bin','lhapdf')
	check_call([lhapdftool,
	'--listdir='+os.path.join(base_dir,'share','LHAPDF'),
	'--pdfdir='+os.path.join(base_dir,'share','LHAPDF'),
	"install",
	pdf])

	prefix['lhapdf']=base_dir
	mark_as_done('lhapdf')

	if opts.lhapdf:
	os.environ['LHAPATH'] = os.path.join(base_dir,'share','LHAPDF')


	# install yoda if needed
	if build_needed('yoda'):
	# from tar ball
	if not opts.yoda_hg:
	download("http://www.hepforge.org/archive/yoda",
	"YODA-"+opts.yoda_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"YODA-"+opts.yoda_ver))
	else :
	if opts.yoda_ver :
	if len(opts.yoda_ver)==5:
	branch="yoda-"+opts.yoda_ver
	else :
	branch=opts.yoda_ver
	else :
	branch=""
	checkout(src_dir,"YODA",opts.yoda_ver,opts.yoda_repo,branch)
	args=[]
	if prefix['boost']:
	args.append("--with-boost="+prefix['boost'])
	compile(args)
	prefix['yoda']=base_dir
	mark_as_done('yoda')

	# install rivet if needed
	if build_needed('rivet'):
	# from tar ball
	if not opts.rivet_hg:
	download("http://www.hepforge.org/archive/rivet",
	"Rivet-"+opts.rivet_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"Rivet-"+opts.rivet_ver))
	else:
	if len(opts.rivet_ver)==5:
	branch="rivet-"+opts.rivet_ver
	else:
	branch=opts.rivet_ver
	checkout(src_dir,"Rivet",opts.rivet_ver,opts.rivet_repo,branch)
	args = ["--enable-unvalidated"]
	for tool in ['boost','gsl','yoda','hepmc','fastjet']:
	if prefix[tool]:
	args.append( "--with-%s=%s" % (tool,prefix[tool]) )
	compile(args)
	prefix['rivet']=base_dir
	mark_as_done('rivet')


	opts.thepeg_hg = True # TODO AFTER RELEASE
	# install thepeg if needed
	if build_needed('thepeg',opts.thepeg_ver):
	# from tar ball

	if not opts.thepeg_hg:
	download("http://www.hepforge.org/archive/thepeg","ThePEG-"+opts.thepeg_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"ThePEG-"+opts.thepeg_ver))
	else:
	if len(opts.thepeg_ver)==5:
	branch="release-"+opts.thepeg_ver[:3].replace(".","-")
	else:
	branch=opts.thepeg_ver
	checkout(src_dir,"ThePEG",opts.thepeg_ver,opts.thepeg_repo,branch)

	args=[]
	for tool in ['boost','gsl','rivet','hepmc','fastjet','lhapdf']:
	if prefix[tool]:
	args.append( "--with-%s=%s" % (tool,prefix[tool]) )
	compile(args)
	prefix['thepeg']=base_dir
	mark_as_done('thepeg',opts.thepeg_ver)

	# install madgraph
	if build_needed('madgraph'):
	# from tar ball
	if not opts.madgraph_bzr:
	mg_name = "MG5_aMC_v"+opts.madgraph_ver.replace(".","_")
	# TODO need to work out path more intelligently. Breaks for non 2.5 releases
	download("https://launchpad.net/mg5amcnlo/2.0/2.5.x/+download","MG5_aMC_v"+opts.madgraph_ver+".tar.gz")
	prefix['madgraph']=os.path.join(opt_dir, mg_name)
	print os.path.join(src_dir, mg_name), os.path.join(opt_dir, mg_name)
	shutil.move(os.path.join(src_dir, mg_name), os.path.join(opt_dir, mg_name))
	del mg_name
	else :
	checkout(opt_dir,"madgraph",opts.madgraph_ver,opts.madgraph_repo,"",'bzr')
	prefix['madgraph']=os.path.join(opt_dir,"madgraph")
	os.chdir(src_dir)
	mark_as_done('madgraph')


	# install the NLO codes if needed
	# install njet if required
	if build_needed('njet'):
	download("https://bitbucket.org/njet/njet/downloads",
	"njet-"+opts.njet_ver+".tar.gz")
	patch("njet-"+opts.njet_ver,
	"""\
	diff blha/njet_olp.cpp
	--- a/blha/njet_olp.cpp 2014-04-25 12:38:30.000000000 +0100
	+++ b/blha/njet_olp.cpp 2016-11-22 12:44:34.187725299 +0000
	@@ -1076,12 +1076,12 @@
	string line;
	int linenum = 0;

	- while (is_good && (is_good = getline(*input, line))) {
	+ while (is_good && (is_good = bool(getline(*input, line)))) {
	linenum++;
	if (line.find(SIGNPREF) == 0) {
	is_njet = true;
	if (stringstream(line.substr(SIGNPREF.length())) >> signval) {
	- is_good = getline(*input, line);
	+ is_good = bool(getline(*input, line));
	linenum++;
	body.push_back(line);
	continue;
	""")
	compile(["--disable-autoflags",
	"FC="+default_fc,
	"F77="+default_fc])
	prefix['njet']=base_dir
	mark_as_done('njet')


	OPENLOOPS_CONFIG = """\
	[OpenLoops]
	fortran_compiler = {fc}
	# fortran_tool = 'gfortran'
	compile_extra = 0
	"""

	# install openloops if needed
	if build_needed('openloops'):
	checkout(opt_dir,"OpenLoops",opts.openloops_ver,opts.openloops_repo,opts.openloops_ver,'svn',
	revision='1945')

	with open('openloops.cfg','w') as f:
	f.write(OPENLOOPS_CONFIG.format(fc=default_fc))

	# We know our gcc works. Disable the strange test that uses the system version number.
	if opts.gcc:
	searchtext = "env.subst('$CCVERSION').split('.')[:2])) < (4,6)"
	with open('tmp.tmp','w') as outfile:
	with open('SConstruct') as infile:
	for line in infile:
	outfile.write(line.replace(searchtext, searchtext + " and False"))
	shutil.move('tmp.tmp','SConstruct')
	del searchtext

	check_call(["./openloops",
	"libinstall",
	opts.openloops_processes,
	"num_jobs=%s" % opts.ncore
	])
	os.chdir(src_dir)
	prefix['openloops']=opt_dir+"/OpenLoops"
	mark_as_done('openloops')


	# install gosam if needed
	if build_needed('gosam'):
	# build qgraf
	if marker_is_missing('qgraf'):
	download('https://www.hepforge.org/archive/herwig/mirror',"qgraf-3.1.4.tgz")
	os.chdir(os.path.join(src_dir,'qgraf-3.1.4'))
	check_call([default_fc,'qgraf-3.1.4.f','-o','qgraf','-O2'])
	shutil.move('qgraf',os.path.join(bin_dir,'qgraf'))
	prefix['qgraf']=base_dir
	os.chdir(src_dir)
	mark_as_done('qgraf')
	# build form
	if marker_is_missing('form'):
	downloadAndCompile('https://gosam.hepforge.org/gosam-installer',"form-4.1",".tar.gz",[])
	prefix['form']=base_dir
	mark_as_done('form')
	# build gosam-contrib
	if marker_is_missing('gosam-contrib'):
	download('https://www.hepforge.org/archive/gosam/gosam-contrib-2.0-20150803.tar.gz',
	"gosam-contrib-2.0.tar.gz", distinct=True)
	os.chdir(os.path.join(src_dir,'gosam-contrib-2.0'))
	# Gosams build system sometimes hangs and needs a second trial
	try:
	compile([])
	except subprocess.CalledProcessError:
	compile([])
	prefix['gosam-contrib']=base_dir
	mark_as_done('gosam-contrib')

	download('https://www.hepforge.org/archive/gosam/','gosam-2.0.3-4146ab2.tar.gz')
	os.chdir(os.path.join(src_dir,'gosam-2.0.3'))

	check_call(["./setup.py",
	"install",
	"--prefix="+base_dir,
	"-f"])
	os.chdir(src_dir)
	prefix['gosam']=base_dir
	mark_as_done('gosam')


	# install vbfnlo if required
	if build_needed('vbfnlo'):
	download("https://www.itp.kit.edu/vbfnlo/archive","vbfnlo-"+opts.vbfnlo_ver+".tgz")
	os.chdir(os.path.join(src_dir,"VBFNLO-"+opts.vbfnlo_ver))
	# work around VBFNLO's broken handwritten compiler checks
	del os.environ['F77']
	check_call(["./configure","--prefix="+base_dir,"--enable-processes="+opts.vbfnlo_processes])
	check_call(["make","-s","-j%s"%opts.ncore])
	check_call(["make","-s","install"])
	# reinsert F77 for the others
	os.environ['F77'] = default_fc
	os.chdir(src_dir)
	prefix['vbfnlo']=base_dir
	mark_as_done('vbfnlo')

	# install TAUOLA if needed
	if False: # build_needed('tauola'):
	download("http://tauolapp.web.cern.ch/tauolapp/resources/TAUOLA." + opts.tauola_ver,
	"TAUOLA." + opts.tauola_ver + ".tar.gz")
	os.chdir(os.path.join(src_dir,"TAUOLA"))
	args=["./configure","--prefix="+base_dir]
	if prefix['hepmc']:
	args.append("--with-hepmc="+prefix['hepmc'])
	check_call(args)
	check_call(["make"])
	check_call(["make","install"])
	os.chdir(src_dir)
	prefix['tauola']=base_dir
	mark_as_done('tauola')

	# install PHOTOS if needed
	if False: # build_needed('photos'):
	download("http://photospp.web.cern.ch/photospp/resources/PHOTOS."+opts.photos_ver,
	"PHOTOS."+opts.photos_ver+".tar.gz")
	os.chdir(os.path.join(src_dir,"PHOTOS"))
	args=["./configure","--prefix="+base_dir]
	if prefix['hepmc']:
	args.append("--with-hepmc="+prefix['hepmc'])
	check_call(args)
	check_call(["make","-j%s" % opts.ncore])
	check_call(["make","install"])
	os.chdir(src_dir)
	prefix['photos']=base_dir
	mark_as_done('photos')

	# install Pytiha8 if needed
	if build_needed('pythia'):
	pythia_version = opts.pythia_ver.replace(".","")
	download("http://home.thep.lu.se/~torbjorn/pythia8","pythia%s.tgz" % pythia_version)
	os.chdir(os.path.join(src_dir,"pythia%s" % pythia_version))
	args=["./configure",
	"--prefix=%s" % base_dir,
	"--enable-shared",]
	### newer versions need this instead of USRCXXFLAGS
	### "--cxx-common='-O2 -pedantic -W -Wall -Wshadow'"]
	if prefix['hepmc']:
	args.append("--with-hepmc=%s" % prefix['hepmc'])
	args.append("--with-hepmcversion=%s" % opts.hepmc_ver)
	else:
	args.append("--without-hepmc")
	os.environ['USRCXXFLAGS'] = opts.cxx11
	check_call(args)
	check_call(["make","-j%s" % opts.ncore])
	check_call(["make","-s","install"])
	del os.environ['USRCXXFLAGS']
	os.chdir(src_dir)
	prefix['pythia'] = base_dir
	mark_as_done('pythia')

	# install EvtGen if needed
	if build_needed('evtgen'):
	download("http://evtgen.warwick.ac.uk/static/srcrep/"+opts.evtgen_ver,
	"EvtGen."+opts.evtgen_ver+".tar.gz")
	os.chdir(os.path.join(src_dir,"EvtGen",opts.evtgen_ver))
	# don't use check_call here, the command may not always complete OK
	subprocess.call(["make","distclean"])
	patch('EvtGen/%s' % opts.evtgen_ver,
	"""\
	-$ diff -u configure
	---- a/configure 2015-10-16 17:46:15.000000000 +0200
	-+++ b/configure 2016-11-22 17:30:48.000000000 +0100
	-@@ -156,12 +156,12 @@
	- #
	- # User-changeable part, experts -----------------------------
	+$ diff -U1 configure
	+--- a/configure 2015-10-16 17:46:15.000000000 +0200
	++++ b/configure 2016-11-23 10:55:45.000000000 +0100
	+@@ -158,3 +158,3 @@
	#
	-CXX=g++
	+CXX="%s"
	CXXFLAGS_OPT="-O2 -Wall"
	- CXXFLAGS_DBG="-g -Wall"
	- CFLAGS_OPT=-O2
	+@@ -163,3 +163,3 @@
	CFLAGS_DBG=-g
	-FC=gfortran
	+FC="%s"
	FFLAGS_OPT="-O2 -Wuninitialized"
	- FFLAGS_DBG=-g
	-
	-@@ -178,1 +178,1 @@
	+@@ -177,4 +177,4 @@
	+ ARCH=`uname`
	-theGcc=`g++ --version \| grep '[0-9]\.[0-9]\.[0-9]' -o \| head -1 \| awk -F . '{print $1}'`
	+-if [ ${theGcc} = 4 ]; then
	+theGcc=`$CXX --version \| grep '[0-9]\.[0-9]\.[0-9]' -o \| head -1 \| awk -F . '{print $1}'`
	-@@ -237,1 +237,1 @@
	++if [ ${theGcc} -ge 4 ]; then
	+ ARCH=${ARCH}-gcc4
	+@@ -222,3 +222,6 @@
	+ CXXFLAGS="${CXXFLAGS_OPT}"
	+- FLIBS="-lgfortran -lgfortranbegin"
	++ FLIBS="-lgfortran"
	++ if [ ${theGcc} = 4 ]; then
	++ FLIBS="$FLIBS -lgfortranbegin"
	++ fi
	+ if [ ${COMPMODE} = OPT ]; then
	+@@ -236,3 +239,3 @@
	+ # Add C++11 options if required
	-theGcc2=`g++ --version \| grep '[0-9]\.[0-9]\.[0-9]' -o \| head -1 \| awk -F . '{print $2}'`
	+theGcc2=`$CXX --version \| grep '[0-9]\.[0-9]\.[0-9]' -o \| head -1 \| awk -F . '{print $2}'`
	-@@ -253,7 +253,7 @@
	-
	- # Mac OS platform with gcc4
	+ gccVar=`echo $theGcc`
	+@@ -255,3 +258,3 @@
	if [[ $ARCH == Darwin* ]]; then
	- tt=`gfortran -print-search-dirs\|grep libraries\|cut -d'=' -f2\|sed 's/:/ /g'`
	+ tt=`$FC -print-search-dirs\|grep libraries\|cut -d'=' -f2\|sed 's/:/ /g'`
	LIBGFORTRANLOCATION=''
	- for i in $tt
	- do
	""" % (default_cxx, default_fc))
	if platform.system() == 'Darwin':
	patch('EvtGen/%s' % opts.evtgen_ver,
	"""\
	$ diff -u configure
	--- a/configure 2016-11-22 17:37:50.000000000 +0100
	+++ b/configure 2016-11-22 22:46:06.000000000 +0100
	@@ -309,10 +309,10 @@
	LIBDIR_ARCHIVE = \$(EVTGENDIR)/lib/archive
	LIBDIRLIST = -lEvtGen

	-LIB_SHARED = \$(LIBDIR_SHARED)/lib\$(GENERATOR).so
	+LIB_SHARED = \$(LIBDIR_SHARED)/lib\$(GENERATOR).dylib
	LIB_ARCHIVE = \$(LIBDIR_ARCHIVE)/lib\$(GENERATOR).a

	-LIBEXT_SHARED = \$(LIBDIR_SHARED)/lib\$(GENERATOR)External.so
	+LIBEXT_SHARED = \$(LIBDIR_SHARED)/lib\$(GENERATOR)External.dylib
	LIBEXT_ARCHIVE = \$(LIBDIR_ARCHIVE)/lib\$(GENERATOR)External.a

	# Flags:
	"""
	)
	args=["./configure","--prefix="+base_dir]
	if prefix['hepmc']:
	args.append("--hepmcdir="+prefix['hepmc'])
	# if prefix['tauola']:
	# args.append("--tauoladir="+prefix['tauola'])
	# if prefix['photos']:
	# args.append("--photosdir="+prefix['photos'])
	if prefix['pythia']:
	args.append("--pythiadir="+prefix['pythia'])
	check_call(args)
	check_call(["make","-j1"])
	check_call(["make","install"])
	os.chdir(src_dir)
	prefix['evtgen']=base_dir
	mark_as_done('evtgen')

	# install herwig if needed
	if build_needed('herwig',opts.herwig_ver):
	# from tar ball
	if not opts.herwig_hg:
	download("http://www.hepforge.org/archive/herwig","Herwig-"+opts.herwig_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"Herwig-"+opts.herwig_ver))
	else:
	if len(opts.herwig_ver)==5:
	branch = "herwig-"+opts.herwig_ver[:3].replace(".","-")
	else:
	branch = opts.herwig_ver
	checkout(src_dir,"Herwig",opts.herwig_ver,opts.herwig_repo,branch)
	args=[]
	for tool in ['thepeg','boost','gsl','fastjet',
	'madgraph','njet','openloops','gosam','vbfnlo',
	'pythia','evtgen']:
	if prefix[tool]:
	args.append( "--with-%s=%s" % (tool,prefix[tool]) )
	compile(args)
	prefix['herwig']=base_dir
	mark_as_done('herwig',opts.herwig_ver)

	# need to have Herwig if we want HJets++
	if not opts.herwig:
	opts.hjets = False

	# install hjets if needed
	if build_needed('hjets'):
	# from tar ball
	if not opts.hjets_hg:
	download("http://www.hepforge.org/archive/hjets",
	"HJets-"+opts.hjets_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"HJets-"+opts.hjets_ver))
	else :
	if len(opts.hjets_ver)==3:
	branch = "release "+opts.hjets_ver
	else:
	branch = opts.hjets_ver
	checkout(src_dir,"HJets",opts.hjets_ver,opts.hjets_repo,branch)
	args=[]
	args.append("--with-herwig="+prefix['herwig'])
	del os.environ['F77']
	compile(args)
	os.environ['F77'] = default_fc
	prefix['hjets']=base_dir
	lib_dirs = os.pathsep.join([os.path.join(prefix['hjets'], 'lib64','HJets'),
	os.path.join(prefix['hjets'], 'lib','HJets'),
	lib_dirs])
	mark_as_done('hjets')

	# generate an 'activate' shell include like python's virtualenv does
	from string import Template

	class ShellTemplate(Template):
	delimiter = '@'

	ACTIVATE = ShellTemplate("""\
	# Herwig bootstrap 'activate',
	# based on Python's virtualenv mechanism

	# This file must be used with "source @{bin_dir}/activate"
	# from bash or zsh. You cannot run it directly.

	deactivate () {

	# reset old environment variables
	if [ "${_OLD_VIRTUAL_PATH-}" = "Unset" ] ; then
	unset PATH
	unset _OLD_VIRTUAL_PATH
	elif [ -n "${_OLD_VIRTUAL_PATH-}" ] ; then
	PATH="$_OLD_VIRTUAL_PATH"
	export PATH
	unset _OLD_VIRTUAL_PATH
	fi

	if [ "${_OLD_VIRTUAL_PYTHONPATH-}" = "Unset" ] ; then
	unset PYTHONPATH
	unset _OLD_VIRTUAL_PYTHONPATH
	elif [ -n "${_OLD_VIRTUAL_PYTHONPATH-}" ] ; then
	PYTHONPATH="$_OLD_VIRTUAL_PYTHONPATH"
	export PYTHONPATH
	unset _OLD_VIRTUAL_PYTHONPATH
	fi

	if [ "${_OLD_VIRTUAL_LHAPATH-}" = "Unset" ] ; then
	unset LHAPATH
	unset _OLD_VIRTUAL_LHAPATH
	elif [ -n "${_OLD_VIRTUAL_LHAPATH-}" ] ; then
	LHAPATH="$_OLD_VIRTUAL_LHAPATH"
	export LHAPATH
	unset _OLD_VIRTUAL_LHAPATH
	fi

	if [ "${_OLD_VIRTUAL_@{ld_env_name}-}" = "Unset" ] ; then
	unset @{ld_env_name}
	unset _OLD_VIRTUAL_@{ld_env_name}
	elif [ -n "${_OLD_VIRTUAL_@{ld_env_name}-}" ] ; then
	@{ld_env_name}="$_OLD_VIRTUAL_@{ld_env_name}"
	export @{ld_env_name}
	unset _OLD_VIRTUAL_@{ld_env_name}
	fi

	if [ "${_OLD_VIRTUAL_CC-}" = "Unset" ] ; then
	unset CC
	unset _OLD_VIRTUAL_CC
	elif [ -n "${_OLD_VIRTUAL_CC-}" ] ; then
	CC="$_OLD_VIRTUAL_CC"
	export CC
	unset _OLD_VIRTUAL_CC
	fi

	if [ "${_OLD_VIRTUAL_CXX-}" = "Unset" ] ; then
	unset CXX
	unset _OLD_VIRTUAL_CXX
	elif [ -n "${_OLD_VIRTUAL_CXX-}" ] ; then
	CXX="$_OLD_VIRTUAL_CXX"
	export CXX
	unset _OLD_VIRTUAL_CXX
	fi

	if [ "${_OLD_VIRTUAL_FC-}" = "Unset" ] ; then
	unset FC
	unset _OLD_VIRTUAL_FC
	elif [ -n "${_OLD_VIRTUAL_FC-}" ] ; then
	FC="$_OLD_VIRTUAL_FC"
	export FC
	unset _OLD_VIRTUAL_FC
	fi

	if [ "${_OLD_VIRTUAL_F77-}" = "Unset" ] ; then
	unset F77
	unset _OLD_VIRTUAL_F77
	elif [ -n "${_OLD_VIRTUAL_F77-}" ] ; then
	F77="$_OLD_VIRTUAL_F77"
	export F77
	unset _OLD_VIRTUAL_F77
	fi

	# This should detect bash and zsh, which have a hash command that must
	# be called to get it to forget past commands. Without forgetting
	# past commands the $PATH changes we made may not be respected
	if [ -n "${BASH-}" -o -n "${ZSH_VERSION-}" ] ; then
	hash -r 2>/dev/null
	fi

	if [ -n "${_OLD_VIRTUAL_PS1-}" ] ; then
	PS1="$_OLD_VIRTUAL_PS1"
	export PS1
	unset _OLD_VIRTUAL_PS1
	fi

	unset HERWIG_ENV
	if [ ! "${1-}" = "nondestructive" ] ; then
	# Self destruct!
	unset -f deactivate
	fi
	}

	# unset irrelevant variables
	deactivate nondestructive

	HERWIG_ENV="@{base_dir}"
	export HERWIG_ENV

	_OLD_VIRTUAL_PATH="${PATH-Unset}"
	PATH="@{bin_dir}:$PATH"
	export PATH

	_OLD_VIRTUAL_PYTHONPATH="${PYTHONPATH-Unset}"
	PYTHONPATH="@{python_path}:$PYTHONPATH"
	export PYTHONPATH

	_OLD_VIRTUAL_LHAPATH="${LHAPATH-Unset}"
	LHAPATH="@{lha_path}:$LHAPATH"
	export LHAPATH

	_OLD_VIRTUAL_@{ld_env_name}="${@{ld_env_name}-Unset}"
	@{ld_env_name}="@{lib_dirs}:$@{ld_env_name}"
	export @{ld_env_name}

	_OLD_VIRTUAL_CC="${CC-Unset}"
	CC="@{default_cc}"
	export CC

	_OLD_VIRTUAL_CXX="${CXX-Unset}"
	CXX="@{default_cxx}"
	export CXX

	_OLD_VIRTUAL_FC="${FC-Unset}"
	FC="@{default_fc}"
	export FC

	_OLD_VIRTUAL_F77="${F77-Unset}"
	F77="@{default_fc}"
	export F77

	if [ -z "${HERWIG_ENV_DISABLE_PROMPT-}" ] ; then
	_OLD_VIRTUAL_PS1="$PS1"
	if [ "x" != x ] ; then
	PS1="$PS1"
	else
	PS1="(`basename \"$HERWIG_ENV\"`)$PS1"
	fi
	export PS1
	fi

	# This should detect bash and zsh, which have a hash command that must
	# be called to get it to forget past commands. Without forgetting
	# past commands the $PATH changes we made may not be respected
	if [ -n "${BASH-}" -o -n "${ZSH_VERSION-}" ] ; then
	hash -r 2>/dev/null
	fi

	""")

	subs = {
	'ld_env_name' : ld_env_name,
	'bin_dir' : bin_dir,
	'base_dir' : base_dir,
	'python_path' : python_path,
	'lib_dirs' : lib_dirs,
	'default_cc' : os.path.basename(default_cc),
	'default_cxx' : os.path.basename(default_cxx),
	'default_fc' : os.path.basename(default_fc),
	'lha_path' : os.path.join(base_dir,'share','LHAPDF')
	}

	activate_file = os.path.join(bin_dir,'activate')

	with open(activate_file,'w') as f:
	f.write(ACTIVATE.substitute(subs))


	# back to the original directory
	os.chdir(current_dir)

	try:
	path_to_activate = os.path.join(os.path.relpath(bin_dir,current_dir),'activate')
	except:
	path_to_activate = activate_file

	print """
	################ / / ^^/ ##########################
	############### /--/ / ###########################
	############## / / / ############################

	Herwig 7 bootstrap was successful.

	$ source %s

	activates all required environment variables.

	$ deactivate

	returns to the original environment variables.
	""" % path_to_activate

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