diff --git a/dev-python/cypari2/cypari2-2.1.4.ebuild b/dev-python/cypari2/cypari2-2.1.4.ebuild
index dc115eeb0..480c240dd 100644
--- a/dev-python/cypari2/cypari2-2.1.4.ebuild
+++ b/dev-python/cypari2/cypari2-2.1.4.ebuild
@@ -5,6 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..12} )
 DISTUTILS_USE_PEP517=standalone
+DISTUTILS_EXT=1
 
 inherit distutils-r1