Slight rework of the installer

installer.nix

@@ -3,7 +3,10 @@
 
   WARNING: Running this installer will format the target disk!
 */
-nixpkgs: machine:
+
+{ nixpkgs, ... }:
+machine:
+
 let
   installer = { config, pkgs, lib, ... }:
     let
@@ -23,9 +26,7 @@ nixpkgs: machine:
         ];
         nixpkgs.hostPlatform = "x86_64-linux";
         services.getty.autologinUser = lib.mkForce "root";
-        programs.bash.loginShellInit = ''
-          ${nixpkgs.lib.getExe bootstrap}
-        '';
+        programs.bash.loginShellInit = nixpkgs.lib.getExe bootstrap;
 
         isoImage = {
           compressImage = false;
@@ -37,4 +38,3 @@ nixpkgs: machine:
       };
 in
 (nixpkgs.lib.nixosSystem { modules = [installer]; }).config.system.build.isoImage
-