Index: WindowMaker/Makefile.in
--- WindowMaker/Makefile.in.orig
+++ WindowMaker/Makefile.in
@@ -835,8 +835,8 @@ uninstall-am: uninstall-dist_prefsdataDATA \
 
 
 $(GENERATED_MENUS):
-	$(AM_V_GEN)sed -e "s:#wprefs#:$(wpexecbindir)/WPrefs:" \
-		-e "s:#wmdatadir#:$(pkgdatadir):" $(srcdir)/$@.in > $@
+	$(AM_V_GEN)sed -e "s:#wprefs#:${TRUEPREFIX}/bin/WPrefs:" \
+		-e "s:#wmdatadir#:${TRUEPREFIX}/share/WindowMaker:" $(srcdir)/$@.in > $@
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.