diff --git a/pkgs/development/tools/yarn/default.nix b/pkgs/development/tools/yarn/default.nix
index f642b22ef279..330212545020 100644
--- a/pkgs/development/tools/yarn/default.nix
+++ b/pkgs/development/tools/yarn/default.nix
@@ -36,5 +36,6 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     license = licenses.bsd2;
     maintainers = with maintainers; [ offline screendriver marsam ];
     platforms = nodejs.meta.platforms;
+    mainProgram = "yarn";
   };
 })