nbstripout: fix build

pkgs/applications/version-management/nbstripout/default.nix

@@ -1,6 +1,6 @@
-{lib, python2Packages, git, mercurial, coreutils}:
+{lib, python, git, mercurial, coreutils}:
 
-with python2Packages;
+with python.pkgs;
 buildPythonApplication rec {
   version = "0.3.6";
   pname = "nbstripout";
@@ -8,7 +8,7 @@ buildPythonApplication rec {
   # Mercurial should be added as a build input but because it's a Python
   # application, it would mess up the Python environment. Thus, don't add it
   # here, instead add it to PATH when running unit tests
-  checkInputs = [ pytest pytest-flake8 pytest-cram git ];
+  checkInputs = [ pytest pytest-flake8 git ];
   nativeBuildInputs = [ pytestrunner ];
   propagatedBuildInputs = [ ipython nbformat ];
 

pkgs/top-level/all-packages.nix

@@ -20194,7 +20194,7 @@ in
 
   clerk = callPackage ../applications/audio/clerk { };
 
-  nbstripout = callPackage ../applications/version-management/nbstripout { };
+  nbstripout = callPackage ../applications/version-management/nbstripout { python = python3; };
 
   ncmpc = callPackage ../applications/audio/ncmpc { };