diff --git a/gmic.spec b/gmic.spec
index 39fa292..693ec8d 100644
--- a/gmic.spec
+++ b/gmic.spec
@@ -1,4 +1,4 @@
-%global gimpplugindir %(gimptool --gimpplugindir)/plug-ins
+%global gimpplugindir %(%___build_pre; gimptool --gimpplugindir)/plug-ins
 
 %global use_system_cimg 1