diff --git a/dev-vcs/breezy/breezy-3.3.9.ebuild b/dev-vcs/breezy/breezy-3.3.9.ebuild
index 958345f93791..03130fffa9ee 100644
--- a/dev-vcs/breezy/breezy-3.3.9.ebuild
+++ b/dev-vcs/breezy/breezy-3.3.9.ebuild
@@ -7,7 +7,7 @@ CRATES=""
 DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
 DISTUTILS_SINGLE_IMPL=1
-PYTHON_COMPAT=( python3_{10..13} )
+PYTHON_COMPAT=( python3_{11..13} )
 
 inherit cargo distutils-r1 optfeature
 
@@ -57,6 +57,12 @@ src_prepare() {
 		-e 's@, strip=Strip\.All@@' \
 		-i setup.py || die
 
+	# https://bugs.gentoo.org/954134
+	find -name '*.pyx' -exec \
+		sed -e '/_AsUnsignedLongMask/s:PyInt:PyLong:' \
+			-e 's:cpython\.int:cpython.long:' \
+			-i {} + || die
+
 	distutils-r1_src_prepare
 }