octoprint.plugins: use callPackage

pkgs/applications/misc/octoprint/default.nix

@@ -1,5 +1,6 @@
 { pkgs
 , stdenv
+, callPackage
 , lib
 , fetchFromGitHub
 , python3
@@ -258,7 +259,7 @@ let
             };
           }
         )
-        (import ./plugins.nix { inherit pkgs; })
+        (callPackage ./plugins.nix { })
         packageOverrides
       ]
     );

pkgs/applications/misc/octoprint/plugins.nix

@@ -1,6 +1,8 @@
-{ pkgs }:
-
-with pkgs;
+{ lib
+, fetchFromGitHub
+, fetchFromGitLab
+, marlin-calc
+}:
 
 self: super:
 let
@@ -246,7 +248,7 @@ in
     preConfigure = ''
       # PrintTimeGenius ships with marlin-calc binaries for multiple architectures
       rm */analyzers/marlin-calc*
-      sed 's@"{}.{}".format(binary_base_name, machine)@"${pkgs.marlin-calc}/bin/marlin-calc"@' -i */analyzers/analyze_progress.py
+      sed 's@"{}.{}".format(binary_base_name, machine)@"${marlin-calc}/bin/marlin-calc"@' -i */analyzers/analyze_progress.py
     '';
 
     meta = with lib; {