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diff --git a/sci-mathematics/mathematica/mathematica-12.1.1.ebuild b/sci-mathematics/mathematica/mathematica-12.1.1.ebuild
new file mode 100644
index 000000000000..51e74ad3cc99
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+++ b/sci-mathematics/mathematica/mathematica-12.1.1.ebuild
@@ -0,0 +1,86 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit multilib versionator xdg
+
+DESCRIPTION="Wolfram Mathematica"
+SRC_URI="Mathematica_${PV}_LINUX.sh"
+HOMEPAGE="https://www.wolfram.com/mathematica/"
+
+LICENSE="all-rights-reserved"
+KEYWORDS="-* ~amd64"
+SLOT="0"
+IUSE=""
+
+RESTRICT="strip mirror bindist fetch"
+
+DEPEND=""
+
+# Mathematica comes with a lot of bundled stuff. We should place here only what we
+# explicitly override with LD_PRELOAD.
+RDEPEND="
+	media-libs/freetype
+"
+
+# we need this a few times
+MPN="Mathematica"
+MPV=$(get_version_component_range 1-2)
+M_BINARIES="MathKernel Mathematica MathematicaScript WolframKernel WolframScript math mathematica mcc wolfram"
+
+# we might as well list all files in all QA variables...
+QA_PREBUILT="opt/*"
+
+S=${WORKDIR}
+
+src_unpack() {
+	/bin/sh "${DISTDIR}/${A}" --nox11 --confirm --keep -- -auto "-targetdir=${S}/opt/Wolfram/${MPN}/${MPV}" "-execdir=${S}/opt/bin" || die
+}
+
+src_install() {
+	local ARCH='-x86-64'
+
+	# move all over
+	mv "${S}"/opt "${D}"/opt || die
+
+	# the autogenerated symlinks point into sandbox, remove
+	rm "${D}"/opt/bin/* || die
+
+	# install wrappers instead
+	for name in ${M_BINARIES} ; do
+		einfo "Generating wrapper for ${name}"
+		echo '#!/bin/sh' >> "${T}/${name}"
+		echo "LD_PRELOAD=/usr/$(get_libdir)/libfreetype.so.6:/$(get_libdir)/libz.so.1 /opt/Wolfram/${MPN}/${MPV}/Executables/${name} \$*" \
+			>> "${T}/${name}"
+		dobin "${T}/${name}"
+	done
+	for name in ${M_BINARIES} ; do
+		einfo "Symlinking ${name} to /opt/bin"
+		dosym ../../usr/bin/${name} /opt/bin/${name}
+	done
+
+	# fix some embedded paths and install desktop files
+	insinto /usr/share/applications
+	for filename in $(find "${D}/opt/Wolfram/Mathematica/10.3/SystemFiles/Installation" -name "wolfram-mathematica.desktop") ; do
+		echo Fixing "${filename}"
+		sed -e "s:${S}::g" -e 's:^\t\t::g' -i "${filename}"
+		echo "Categories=Physics;Science;Engineering;2DGraphics;Graphics;" >> "${filename}"
+		doins "${filename}"
+	done
+
+	# install mime types
+	insinto /usr/share/mime/application
+	for filename in $(find "${D}/opt/Wolfram/Mathematica/10.3/SystemFiles/Installation" -name "application-*.xml"); do
+		basefilename=$(basename "${filename}")
+		mv "${filename}" "${T}/${basefilename#application-}"
+		doins "${T}/${basefilename#application-}"
+	done
+}
+
+pkg_nofetch() {
+	einfo "Please place the Wolfram Mathematica installation file ${SRC_URI}"
+	einfo "in your \$\{DISTDIR\}."
+	einfo "Note that to actually run and use Mathematica you need a valid license."
+	einfo "Wolfram provides time-limited evaluation licenses at ${HOMEPAGE}"
+}