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-rw-r--r--nixos/modules/programs/fish.nix17
1 files changed, 7 insertions, 10 deletions
diff --git a/nixos/modules/programs/fish.nix b/nixos/modules/programs/fish.nix
index c85097f45e9..b500b8f24b2 100644
--- a/nixos/modules/programs/fish.nix
+++ b/nixos/modules/programs/fish.nix
@@ -258,16 +258,13 @@ in
             preferLocalBuild = true;
             allowSubstitutes = false;
           };
-          generateCompletions = package: pkgs.runCommand
-            "${package.name}_fish-completions"
-            (
-              {
-                inherit package;
-                preferLocalBuild = true;
-                allowSubstitutes = false;
-              }
-              // optionalAttrs (package ? meta.priority) { meta.priority = package.meta.priority; }
-            )
+          generateCompletions = package: pkgs.runCommandLocal
+            ( with lib.strings; let
+                storeLength = stringLength storeDir + 34; # Nix' StorePath::HashLen + 2 for the separating slash and dash
+                pathName = substring storeLength (stringLength package - storeLength) package;
+              in (package.name or pathName) + "_fish-completions")
+            ( { inherit package; } //
+              optionalAttrs (package ? meta.priority) { meta.priority = package.meta.priority; })
             ''
               mkdir -p $out
               if [ -d $package/share/man ]; then