--- gobject-introspection-1.66.0/tools/g-ir-tool-template.in.orig	2020-09-12 19:25:46.030139400 +0200
+++ gobject-introspection-1.66.0/tools/g-ir-tool-template.in	2020-09-26 10:38:05.871078700 +0200
@@ -49,13 +49,14 @@
 datadir = os.path.abspath(os.path.join(filedir, '..', 'share'))
 # Fallback to hard-coded paths if the relocatable paths are wrong
 if not os.path.isdir(os.path.join(datadir, 'gir-1.0')):
-    datadir = "@datarootdir@"
+    datadir = os.path.join(sys.prefix, "share")
 
 builtins.__dict__['DATADIR'] = datadir
 
 # Respect gir_dir_prefix
 girdir = ''
 girdir = os.path.abspath(os.path.join(filedir, '..', '@gir_dir_prefix@'))
+girdir = os.path.join(sys.prefix, "share")
 builtins.__dict__['GIRDIR'] = [girdir]
 
 # Again, relative paths first so that the installation prefix is relocatable
@@ -87,7 +88,7 @@
     else:
         # Okay, we're not running uninstalled and the prefix is not
         # relocatable. Use hard-coded libdir.
-        pylibdir = os.path.join('@libdir@', 'gobject-introspection')
+        pylibdir = os.path.join(sys.prefix, 'lib', 'gobject-introspection')
 
 sys.path.insert(0, pylibdir)