diff --git a/textproc/py-libxslt/Makefile b/textproc/py-libxslt/Makefile
index a7280478cf5e..99fa4d5b774e 100644
--- a/textproc/py-libxslt/Makefile
+++ b/textproc/py-libxslt/Makefile
@@ -24,7 +24,9 @@ DOCSDIR=	${PREFIX}/share/doc/py-libxslt
 EXAMPLESDIR=	${PREFIX}/share/examples/py-libxslt
 
 post-install:
-	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py -l ${STAGEDIR}${PYTHON_SITELIBDIR}
-	@${PYTHON_CMD} -O ${PYTHON_LIBDIR}/compileall.py -l ${STAGEDIR}${PYTHON_SITELIBDIR}
+	@cd ${STAGEDIR}${PREFIX} && ${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py \
+		-d ${PYTHONPREFIX_SITELIBDIR} -f ${PYTHONPREFIX_SITELIBDIR:S;${PREFIX}/;;}
+	@cd ${STAGEDIR}${PREFIX} && ${PYTHON_CMD} -O ${PYTHON_LIBDIR}/compileall.py \
+		-d ${PYTHONPREFIX_SITELIBDIR} -f ${PYTHONPREFIX_SITELIBDIR:S;${PREFIX}/;;}
 
 .include "${MASTERDIR}/Makefile"