python3.pkgs.pyerfa: Enable and fix tests & more

Use NIX_CFLAGS_COMPILE = "-O2", due to upstream issue. cd "$out" to
avoid circular import issue (discuessed downstream at at
NixOS#255262).

pkgs/development/python-modules/pyerfa/default.nix

@@ -1,27 +1,36 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, fetchpatch
 , jinja2
 , oldest-supported-numpy
 , setuptools-scm
 , wheel
 , liberfa
 , packaging
 , numpy
+, pytestCheckHook
+, pytest-doctestplus
 }:
 
 buildPythonPackage rec {
   pname = "pyerfa";
   format = "pyproject";
   version = "2.0.0.3";
 
-  doCheck = false;
-
   src = fetchPypi {
     inherit pname version;
     hash = "sha256-13+7+lg1DBlMy5nl2TqgXTwrFNWq2LZi2Txq2f/0Hzk=";
   };
 
+  patches = [
+    # Sort of helps maybe for https://github.com/liberfa/pyerfa/issues/112
+    (fetchpatch {
+      url = "https://github.com/liberfa/pyerfa/commit/4866342b94c5e7344711146f1186a4c3e7534da8.patch";
+      hash = "sha256-uPFFdLYfRweQdeEApBAw6Ulqh31NTQwwmnaU+x/M+C0=";
+    })
+  ];
+
   nativeBuildInputs = [
     jinja2
     oldest-supported-numpy
@@ -31,14 +40,32 @@ buildPythonPackage rec {
   ];
 
   propagatedBuildInputs = [
-    liberfa
     numpy
   ];
+  buildInputs = [
+    liberfa
+  ];
 
   preBuild = ''
     export PYERFA_USE_SYSTEM_LIBERFA=1
   '';
 
+  # See https://github.com/liberfa/pyerfa/issues/112#issuecomment-1721197483
+  NIX_CFLAGS_COMPILE = "-O2";
+  nativeCheckInputs = [
+    pytestCheckHook
+    pytest-doctestplus
+  ];
+  # Getting circular import errors without this, not clear yet why. This was mentioned to
+  # upstream at: https://github.com/liberfa/pyerfa/issues/112 and downstream at
+  # https://github.com/NixOS/nixpkgs/issues/255262
+  preCheck = ''
+    cd $out
+  '';
+  pythonImportsCheck = [
+    "erfa"
+  ];
+
   meta = with lib; {
     description = "Python bindings for ERFA routines";
     longDescription = ''