Merge pull request #12363 from roberth/issue-12161

Issue #12161, add `meta.mainProgram`

Author: roberth

packaging/everything.nix

@@ -93,6 +93,7 @@ let
       libs = throw "`nix.dev.libs` is not meant to be used; use `nix.libs` instead.";
     };
     meta = {
+      mainProgram = "nix";
       pkgConfigModules = [
         "nix-cmd"
         "nix-expr"

src/nix/package.nix

@@ -103,6 +103,7 @@ mkMesonExecutable (finalAttrs: {
   ];
 
   meta = {
+    mainProgram = "nix";
     platforms = lib.platforms.unix ++ lib.platforms.windows;
   };