--- a/Makefile.in	2019-09-21 18:47:40.749628914 +0200
+++ b/Makefile.in	2019-09-21 18:48:08.547200073 +0200
@@ -30,7 +30,7 @@
 
 GPRBUILD_FULL = ${GPRBUILD} -j${PROCESSORS} -m -p ${GPRBUILD_SWITCHES}
 GPRINSTALL_FULL = ${GPRINSTALL} -p -f --project-subdir=$(PRJDIR) \
-	--build-var=GTKADA_BUILD,LIBRARY_TYPE --install-name=gtkada \
+	--build-var=LIBRARY_TYPE --install-name=gtkada \
 	--prefix=${DESTDIR}$(prefix) -XGTK_PREFIX=${prefix}
 
 GETTEXT_INTL=@GETTEXT_INTL@