Otherwise the build fails when it is installed and PORTS_PRIVSEP is enabled.

OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/geo/qgis/Makefile,v
diff -u -p -r1.237 Makefile
--- Makefile	29 Aug 2026 05:23:13 -0000	1.237
+++ Makefile	3 Sep 2026 23:12:06 -0000
@@ -139,6 +139,7 @@ WANTLIB += absl_tracing_internal
 
 CONFIGURE_ENV+=	VERBOSE=1
 CONFIGURE_ARGS +=-DPYTHON_EXECUTABLE=${MODPY_BIN} \
+		-DUSE_CCACHE=FALSE \
 		-DWITH_QTWEBENGINE=ON \
 		-DWITH_INTERNAL_MDAL=FALSE \
 		-DWITH_3D=TRUE \