python3Packages.jupyter-repo2docker: fix build

pkgs/development/python-modules/jupyter-repo2docker/default.nix

@@ -1,18 +1,14 @@
-{ stdenv
-, buildPythonPackage
-, fetchPypi
-, pkgs-docker
+{ stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
 , docker
-, traitlets
-, python-json-logger
 , escapism
 , jinja2
-, ruamel_yaml
+, pkgs-docker
+, python-json-logger
 , pyyaml
-, pytest
-, wheel
-, pytestcov
-, pythonAtLeast
+, ruamel_yaml
+, semver
+, toml
+, traitlets
 }:
 
 buildPythonPackage rec {
@@ -25,12 +21,28 @@ buildPythonPackage rec {
     sha256 = "7965262913be6be60e64c8016f5f3d4bf93701f2787209215859d73b2adbc05a";
   };
 
-  checkInputs = [ pytest pyyaml wheel pytestcov ];
-  propagatedBuildInputs = [ pkgs-docker docker traitlets python-json-logger escapism jinja2 ruamel_yaml ];
+  propagatedBuildInputs = [
+    docker
+    escapism
+    jinja2
+    pkgs-docker
+    python-json-logger
+    ruamel_yaml
+    semver
+    toml
+    traitlets
+  ];
 
   # tests not packaged with pypi release
   doCheck = false;
 
+  pythonImportsCheck = [
+    "repo2docker"
+    "repo2docker.app"
+    "repo2docker.utils"
+    "repo2docker.contentproviders.base"
+  ];
+
   meta = with stdenv.lib; {
     homepage = https://repo2docker.readthedocs.io/en/latest/;
     description = "Repo2docker: Turn code repositories into Jupyter enabled Docker Images";