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diff --git a/sci-physics/pythia/pythia-6.4.28-r1.ebuild b/sci-physics/pythia/pythia-6.4.28-r1.ebuild
new file mode 100644
index 000000000000..92d4af7849ac
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+++ b/sci-physics/pythia/pythia-6.4.28-r1.ebuild
@@ -0,0 +1,68 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=5
+
+inherit autotools fortran-2 versionator
+
+MV=$(get_major_version)
+MY_PN=${PN}${MV}
+DOC_PV=0613
+EX_PV=6.4.18
+PYR_P=pythia6-20160413
+
+DESCRIPTION="Lund Monte Carlo high-energy physics event generator"
+HOMEPAGE="http://pythia6.hepforge.org/"
+
+# pythia6 from root is needed for some files to interface pythia6 with root.
+# To produce a split version, replace the 6.4.x by the current version:
+# svn export http://svn.hepforge.org/pythia6/tags/v_6_4_x/ pythia-6.4.x
+# tar cJf pythia-6.4.x.tar.xz
+SRC_URI="
+	https://dev.gentoo.org/~bicatali/distfiles/${P}.tar.xz
+	https://root.cern.ch/download/pythia6.tar.gz -> ${PYR_P}.tar.gz
+	doc? ( http://home.thep.lu.se/~torbjorn/pythia/lutp${DOC_PV}man2.pdf )
+	examples? ( mirror://gentoo/${PN}-${EX_PV}-examples.tar.bz2 )"
+
+SLOT="6"
+LICENSE="public-domain"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="doc examples static-libs"
+
+src_prepare() {
+	cp ../pythia6/tpythia6_called_from_cc.F .
+	cp ../pythia6/pythia6_common_address.c .
+	cat > configure.ac <<-EOF
+		AC_INIT(${PN},${PV})
+		AM_INIT_AUTOMAKE
+		AC_PROG_F77
+		LT_INIT
+		AC_CHECK_LIB(m,sqrt)
+		AC_CONFIG_FILES(Makefile)
+		AC_OUTPUT
+	EOF
+	echo >> Makefile.am "lib_LTLIBRARIES = libpythia6.la"
+	echo >> Makefile.am "libpythia6_la_SOURCES = \ "
+	# replace wildcard from makefile to ls in shell
+	local f
+	for f in py*.f struct*.f up*.f fh*.f; do
+		echo  >> Makefile.am "  ${f} \\"
+	done
+	echo  >> Makefile.am "  ssmssm.f sugra.f visaje.f pdfset.f \\"
+	echo  >> Makefile.am "  tpythia6_called_from_cc.F pythia6_common_address.c"
+	eautoreconf
+}
+
+src_configure() {
+	econf $(use_enable static-libs static)
+}
+
+src_install() {
+	default
+	dodoc update_notes.txt
+	use doc && dodoc "${DISTDIR}"/lutp${DOC_PV}man2.pdf
+	if use examples; then
+		insinto /usr/share/doc/${PF}
+		doins -r "${WORKDIR}"/examples
+	fi
+}