diff --git a/garlic/pp/rplot.nix b/garlic/pp/rplot.nix
index 343e2f6..17d7d54 100644
--- a/garlic/pp/rplot.nix
+++ b/garlic/pp/rplot.nix
@@ -28,7 +28,7 @@ in stdenv.mkDerivation {
   installPhase = ''
     mkdir -p $out
     cd $out
-    ln -s ${dataset} input.json
+    ln -s ${dataset} input
     Rscript --vanilla ${script} ${dataset}
   '';
 }