pyp: cleanup (#417604)

pkgs/by-name/py/pyp/package.nix

@@ -1,13 +1,16 @@
 {
   lib,
-  bc,
+  python3Packages,
   fetchFromGitHub,
+
+  # tests
+  addBinToPathHook,
+  bc,
   jq,
-  python3,
+  versionCheckHook,
 }:
 
 let
-  pythonPackages = python3.pkgs;
   finalAttrs = {
     pname = "pyp";
     version = "1.3.0";
@@ -21,35 +24,26 @@ let
 
     pyproject = true;
 
-    build-system = with pythonPackages; [
+    build-system = with python3Packages; [
       flit-core
     ];
 
     nativeCheckInputs =
-      (with pythonPackages; [
+      (with python3Packages; [
         pytestCheckHook
       ])
       ++ [
+        addBinToPathHook
         bc
         jq
+        versionCheckHook
       ];
+    versionCheckProgramArg = "--version";
 
     pythonImportsCheck = [
       "pyp"
     ];
 
-    # without this, the tests fail because they are unable to find the pyp tool
-    # itself...
-    preCheck = ''
-      _OLD_PATH_=$PATH
-      PATH=$out/bin:$PATH
-    '';
-
-    # And a cleanup!
-    postCheck = ''
-      PATH=$_OLD_PATH_
-    '';
-
     meta = {
       homepage = "https://github.com/hauntsaninja/pyp";
       description = "Easily run Python at the shell";
@@ -62,4 +56,4 @@ let
     };
   };
 in
-pythonPackages.buildPythonPackage finalAttrs
+python3Packages.buildPythonPackage finalAttrs