(hopefully) fix fish

wrappers/fish/config.fish

@@ -1,3 +1,7 @@
+# Set up path
+fish_add_path --path --prepend '@bat@/bin'
+fish_add_path --path --prepend '@eza@/bin'
+
 # Abbreviations
 abbr --add --global -- flake-update 'nix flake lock --update-input'
 abbr --add --global -- ns 'nix shell'

wrappers/fish/default.nix

@@ -4,16 +4,22 @@
   ...
 }: {
   # TODO: Fix once https://github.com/viperML/wrapper-manager/issues/14 is resolved
-  wrappers.fish = {
-    basePackage = pkgs.runCommandNoCC "fish-binary" {} ''
+  wrappers.fish = let
+    inherit (pkgs) runCommandNoCC;
+  in {
+    basePackage = runCommandNoCC "fish-binary" {} ''
       install -D -m555 ${lib.getExe pkgs.fish} "$out/bin/fish"
     '';
+    extraWrapperFlags = "--inherit-argv0";
 
-    prependFlags = [
+    prependFlags = let
+      # Can't use pathAdd because fish used as login shell will ignore the variables the wrapper sets up
+      config-fish = runCommandNoCC "config.fish" { inherit (pkgs) bat eza; } ''
+        substituteAll ${./config.fish} "$out"
+      '';
+    in [
       "-C"
-      "source ${./config.fish}"
+      "source ${config-fish}"
     ];
-
-    pathAdd = with pkgs; [bat eza];
   };
 }