stdenv/check-meta: Fix error message for disallowed unfree packages

Nixpkgs tries to print a helpful message when it blocks unfree packages,
but the suggestion is subtly broken. The predicate only matches on the
package's name, but the suggestion includes the full name-version pair.

Fixed by formatting the message with the same function as the predicate.

This issue arises because check-meta defines its own local getName with
semantics divergent from lib.getName. The former includes the version,
the latter does not.

Example Before:

    Alternatively you can configure a predicate to allow specific packages:
      { nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
          "obsidian-1.5.12"
        ];
      }

Example After:

    Alternatively you can configure a predicate to allow specific packages:
      { nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
          "obsidian"
        ];
      }

Fixes #303116

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/stdenv/generic/check-meta.nix b/pkgs/stdenv/generic/check-meta.nix
index bcb2ca249ddfd..a61f3e1ae4d0f 100644
--- a/pkgs/stdenv/generic/check-meta.nix
+++ b/pkgs/stdenv/generic/check-meta.nix
@@ -189,7 +189,7 @@ let
 
       Alternatively you can configure a predicate to allow specific packages:
         { nixpkgs.config.${predicateConfigAttr} = pkg: builtins.elem (lib.getName pkg) [
-            "${getName attrs}"
+            "${lib.getName attrs}"
           ];
         }
     '';