diff --git a/pkgs/servers/x11/xorg/generate-expr-from-tarballs.pl b/pkgs/servers/x11/xorg/generate-expr-from-tarballs.pl
index d0f88c4dfdbc..9fa149ffe1e3 100755
--- a/pkgs/servers/x11/xorg/generate-expr-from-tarballs.pl
+++ b/pkgs/servers/x11/xorg/generate-expr-from-tarballs.pl
@@ -34,7 +34,7 @@ $pcMap{"uuid"} = "libuuid";
 $pcMap{"libudev"} = "udev";
 $pcMap{"gl"} = "libGL";
 $pcMap{"GL"} = "libGL";
-$pcMap{"gbm"} = "mesa";
+$pcMap{"gbm"} = "libgbm";
 $pcMap{"hwdata"} = "hwdata";
 $pcMap{"\$PIXMAN"} = "pixman";
 $pcMap{"\$RENDERPROTO"} = "xorgproto";