home-manager: avoid import to improve error messages

When using `import` to inject the configuration into the module system
we lose the location in error messages, i.e., it just says
``<unknown-file>'`.

1 files changed, 3 insertions, 4 deletions

diff --git a/home-manager/home-manager.nix b/home-manager/home-manager.nix
index 206a1bcefa3..a4b3c44390f 100644
--- a/home-manager/home-manager.nix
+++ b/home-manager/home-manager.nix
@@ -11,10 +11,9 @@ let
 
   env = import <home-manager/modules> {
     configuration =
-      let
-        conf = import confPath;
-      in
-        if confAttr == "" then conf else conf.${confAttr};
+      if confAttr == ""
+      then confPath
+      else (import confPath).${confAttr};
     pkgs = pkgs;
     check = check;
   };