diff --git a/packages/xcb-proto/build.sh b/packages/xcb-proto/build.sh
index 4aa846b21..3790c2556 100644
--- a/packages/xcb-proto/build.sh
+++ b/packages/xcb-proto/build.sh
@@ -11,5 +11,7 @@ TERMUX_PKG_PLATFORM_INDEPENDENT=true
 TERMUX_PKG_CONFLICTS="xcbproto"
 TERMUX_PKG_REPLACES="xcbproto"
 
-python_version=$(. $TERMUX_SCRIPTDIR/packages/python/build.sh; echo $_MAJOR_VERSION)
-TERMUX_PKG_RM_AFTER_INSTALL="lib/python${python_version}/site-packages/xcbgen/__pycache__"
+termux_step_configure() {
+	python_version=$(. $TERMUX_SCRIPTDIR/packages/python/build.sh; echo $_MAJOR_VERSION)
+	TERMUX_PKG_RM_AFTER_INSTALL="lib/python${python_version}/site-packages/xcbgen/__pycache__"
+}