mesa: Fix cross-compilation

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

pkgs/development/libraries/mesa/default.nix

@@ -159,6 +159,7 @@ self = stdenv.mkDerivation {
     meson pkg-config ninja
     intltool bison flex file
     python3Packages.python python3Packages.Mako
+    jdupes
   ] ++ lib.optionals (elem "wayland" eglPlatforms) [
     wayland-scanner
   ];
@@ -235,7 +236,7 @@ self = stdenv.mkDerivation {
     done
 
     # NAR doesn't support hard links, so convert them to symlinks to save space.
-    ${jdupes}/bin/jdupes --hard-links --link-soft --recurse "$drivers"
+    jdupes --hard-links --link-soft --recurse "$drivers"
 
     # add RPATH so the drivers can find the moved libgallium and libdricore9
     # moved here to avoid problems with stripping patchelfed files