diff --git a/build/python312/common.sh b/build/python312/common.sh
index 32c5b4a91..aaad88e17 100644
--- a/build/python312/common.sh
+++ b/build/python312/common.sh
@@ -45,6 +45,8 @@ TMPDIR+="/python$PYVER"
 DTMPDIR+="/python$PYVER"
 BASE_TMPDIR=$TMPDIR
 
+PEP518OPTS+=" --ignore-installed"
+
 # Use the same python version for dependency resolution
 PKGDEPEND="/usr/bin/python$PYTHONVER -Es $PKGDEPEND"