nix-cli: restore binary-dist artifact to Hydra static builds

src/nix/package.nix

@@ -1,4 +1,5 @@
 {
+  stdenv,
   lib,
   mkMesonExecutable,
 
@@ -94,6 +95,11 @@ mkMesonExecutable (finalAttrs: {
   mesonFlags = [
   ];
 
+  postInstall = lib.optionalString stdenv.hostPlatform.isStatic ''
+    mkdir -p $out/nix-support
+    echo "file binary-dist $out/bin/nix" >> $out/nix-support/hydra-build-products
+  '';
+
   meta = {
     mainProgram = "nix";
     platforms = lib.platforms.unix ++ lib.platforms.windows;