diff --git a/sci-mathematics/lean-mathlib/Manifest b/sci-mathematics/lean-mathlib/Manifest
new file mode 100644
index 0000000000..6d4751f6e1
--- /dev/null
+++ b/sci-mathematics/lean-mathlib/Manifest
@@ -0,0 +1 @@
+DIST lean-mathlib-0.1_p20211021.tar.gz 6665360 BLAKE2B 92d7627a095fd8cbc2bbdeccd9321c86badbd36152a034a15d005eadd0507c21aeeb73ecbef8199a267104b5b881ba5b100355e48003c68785205650c4a23876 SHA512 792e8074cba39d1baab87f47af64c49f2a95043c8e9d592f41fe87d8697405c2595933954e1fbf30cb657551e2350fa274e405996d030e47db166cd078a232e4
diff --git a/sci-mathematics/lean-mathlib/lean-mathlib-0.1_p20211021.ebuild b/sci-mathematics/lean-mathlib/lean-mathlib-0.1_p20211021.ebuild
new file mode 100644
index 0000000000..5b3bfe7c8e
--- /dev/null
+++ b/sci-mathematics/lean-mathlib/lean-mathlib-0.1_p20211021.ebuild
@@ -0,0 +1,43 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+COMMIT="3c11bd771ef17197a9e9fcd4a3fabfa2804d950c"
+
+DESCRIPTION="Lean mathematical components library"
+HOMEPAGE="https://github.com/leanprover-community/mathlib"
+SRC_URI="https://github.com/leanprover-community/mathlib/archive/${COMMIT}.tar.gz -> ${PF}.tar.gz"
+S="${WORKDIR}/mathlib-${COMMIT}"
+
+KEYWORDS="~amd64"
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE="test"
+
+RDEPEND=">=dev-lang/lean-3.34.0"
+DEPEND="
+	${RDEPEND}
+	sci-mathematics/mathlib-tools
+"
+
+RESTRICT="!test? ( test )"
+
+src_configure() {
+	leanpkg configure || die
+}
+
+src_compile() {
+	leanpkg build || die
+}
+
+src_install() {
+	dodoc -r docs
+	rm -r docs || die
+	insinto /usr/lib/lean/mathlib
+	doins -r .
+}
+
+src_test() {
+	leanpkg test || die
+}
diff --git a/sci-mathematics/lean-mathlib/metadata.xml b/sci-mathematics/lean-mathlib/metadata.xml
new file mode 100644
index 0000000000..3005583c85
--- /dev/null
+++ b/sci-mathematics/lean-mathlib/metadata.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+
+<pkgmetadata>
+  <maintainer type="person">
+    <email>lssndrbarbieri@gmail.com</email>
+    <name>Alessandro Barbieri</name>
+  </maintainer>
+  <longdescription lang="en">
+  </longdescription>
+  <upstream>
+    <bugs-to>https://github.com/leanprover-community/mathlib/issues</bugs-to>
+    <remote-id type="github">leanprover-community/mathlib</remote-id>
+  </upstream>
+</pkgmetadata>