diff --git a/dev-python/lit/Manifest b/dev-python/lit/Manifest
index a61a6b1d4cf6..1c31485f030c 100644
--- a/dev-python/lit/Manifest
+++ b/dev-python/lit/Manifest
@@ -12,5 +12,7 @@ DIST llvm-project-20.1.8.src.tar.xz 147242952 BLAKE2B 7657ac0b26acc5affb1bfc91b9
 DIST llvm-project-20.1.8.src.tar.xz.sig 566 BLAKE2B 85beedfcff1195a974fab2c667b9efd4b715b3480c1b44b1b887fe32c69f72aca0d3b8fb276c03b6cc5a866622f669047aeee5ccb976640b4008ccd31dce77a4 SHA512 d74369bdb4d1b82775161ea53c9c5f3a23ce810f4df5ff617123023f9d8ce720e7d6ecc9e17f8ebd39fd9e7a9de79560abdf2ffe73bcb907a43148d43665d619
 DIST llvm-project-21.1.4.src.tar.xz 158939036 BLAKE2B b87eff4e3cb881d86aafcfdb46d85344ad6ae92d5c1e72c05282f375b4b11844756d0e6b4d0da5e522a348170a5da9842917737e272b758d8dde7e1fb2bee135 SHA512 a8c0883abe7c5a3e55ca7ed0fd974fae4351184a0b0df18295a982ca8ddb0f8d167353564204ed00f0cd9a1d8baef7074c0b39a99e0b5c52ced6bbee73dde3da
 DIST llvm-project-21.1.4.src.tar.xz.sig 119 BLAKE2B c74a56448ad3e325234fcbe7d62ea888831e1e7696afb5aa5a185ea76a0880abe2d755f9e69a07760bbf9380534c3bb96c920ed6359ffd0f5f51c962d1494dcf SHA512 4812c2e3861aa3b726d842c3ca259b19ef1aa531fed9f6f47099483de91de2b2a165f40d243f6f40f2eea749741d5f8b7090f394399c56db02053f308921077a
+DIST llvm-project-21.1.5.src.tar.xz 158957032 BLAKE2B c056049214b18a17a3fd2dc86ae82121a821841002b8386b1fe35fc34f1f0faeb681f39880814e4a47f976b2744bfd2c4f1316156469c6b6a79c013d200dab30 SHA512 865ad44575c9288f06da8c48acbb60779f6c38aaf2ee85eac2002452f83892b704263f2ef51d3596abf06dccc1559f1d9dcdc89120363efd8ce1b1239ae83f6b
+DIST llvm-project-21.1.5.src.tar.xz.sig 119 BLAKE2B abf014908e981ea358ee38f6d1ef6c745ebbe51011fa7e83a514672bbad152fac92c95dd32a7b52a8d9c2a2a9ea1b44e447bb0bc5953f0f7bbd9ced34aa3c0cc SHA512 4e327c7d60525526ff3ac6ca58f1e753a57f841b88078a9bfe2a2ce91e4a5e17bcc52fd2f27f75801540610c1a56d57a3070243f13ad583e3526901b1f7be4a5
 DIST llvm-project-7631c73850bec991ec9a7c9cca58c275bb0277a4.tar.gz 253713417 BLAKE2B 0126bdf53ffb57ca0fa471c01deb4f0a9f824083c332f72e14ea7dc843cf80e7360aa0bcd8eff22f42f993db2b077c696c25232c1a9d98cfa865d98569398b55 SHA512 58488afe3eb7865f171ac5f692a8c1252bf3d049420a72e72581e5024066b2a4ba2dbfa5c9f06de799ad3e04949997e61c60ee0f89aa6a8642b6d9263c78a144
 DIST llvm-project-c1779f33bdada6e478e882cc23a647ef9abaad96.tar.gz 253250521 BLAKE2B fbd40cb52d56d5a817ff6cb469b9772af4eb358584eed1440c82864923add456961a672784838f510c390680a54c4abc7a33159848a34133f8d23b80b5feb0ef SHA512 01f8944ee6c89fd4a56caab236b302bc6b49b933c968a73edcb00ae2522b884371a05a75dec1321b0efed24e20cde4a58e1697c3c097f26ed0fbd629d8cf561c
diff --git a/dev-python/lit/lit-21.1.5.ebuild b/dev-python/lit/lit-21.1.5.ebuild
new file mode 100644
index 000000000000..2c41baf16b31
--- /dev/null
+++ b/dev-python/lit/lit-21.1.5.ebuild
@@ -0,0 +1,46 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=setuptools
+PYTHON_COMPAT=( python3_{11..14} )
+
+inherit distutils-r1 llvm.org
+
+DESCRIPTION="A stand-alone install of the LLVM suite testing tool"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+# Tests require 'FileCheck' and 'not' utilities (from llvm)
+BDEPEND="
+	test? (
+		dev-python/psutil[${PYTHON_USEDEP}]
+		llvm-core/llvm
+	)
+"
+
+LLVM_COMPONENTS=( llvm/utils/lit )
+llvm.org_set_globals
+
+# TODO: move the manpage generation here (from llvm-core/llvm)
+
+src_prepare() {
+	# flaky test
+	# https://github.com/llvm/llvm-project/issues/72022
+	rm tests/progress-bar.py || die
+
+	cd "${WORKDIR}" || die
+	distutils-r1_src_prepare
+}
+
+python_test() {
+	local -x LIT_PRESERVES_TMP=1
+	local litflags=$(get_lit_flags)
+	./lit.py ${litflags//;/ } tests || die
+}