diff --git a/dev-python/guppy3/guppy3-3.1.3.ebuild b/dev-python/guppy3/guppy3-3.1.3.ebuild
index 8f4ec82773..5b4ce183de 100644
--- a/dev-python/guppy3/guppy3-3.1.3.ebuild
+++ b/dev-python/guppy3/guppy3-3.1.3.ebuild
@@ -5,6 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..11} )
 DISTUTILS_USE_PEP517=setuptools
+DISTUTILS_EXT=1
 inherit distutils-r1 pypi
 
 DESCRIPTION="A Python Programming Environment & Heap analysis toolset"