--- b/textproc/py-gi-docgen/Makefile	
+++ b/textproc/py-gi-docgen/Makefile	
@@ -1,5 +1,6 @@ 
 PORTNAME=	gi-docgen
 PORTVERSION=	2021.5
+PORTREVISION=	1
 CATEGORIES=	textproc python
 MASTER_SITES=	GNOME
 PKGNAMEPREFIX=  ${PYTHON_PKGNAMEPREFIX}
@@ -25,4 +26,8 @@ USE_PYTHON= 	autoplist distutils
 
 NO_ARCH=	yes
 
+post-patch:
+	${REINPLACE_CMD} -e 's|%%LOCALBASE%%|${LOCALBASE}|' \
+		${WRKSRC}/gidocgen/utils.py
+
 .include <bsd.port.mk>
--- /dev/null	
+++ b/textproc/py-gi-docgen/files/patch-gidocgen_utils.py	
@@ -0,0 +1,11 @@ 
+--- gidocgen/utils.py.orig	2021-04-15 15:10:34 UTC
++++ gidocgen/utils.py
+@@ -810,7 +810,7 @@ def find_program(bin_name, path=None):
+ 
+ def default_search_paths():
+     if not sys.platform == 'win32':
+-        xdg_data_dirs = os.environ.get("XDG_DATA_DIRS", "/usr/share:/usr/local/share").split(":")
++        xdg_data_dirs = os.environ.get("XDG_DATA_DIRS", "/usr/share:%%LOCALBASE%%/share").split(":")
+         xdg_data_home = os.environ.get("XDG_DATA_HOME", os.path.expanduser("~/.local/share"))
+     else:
+         xdg_data_dirs = None