buildPythonPackage: fix numpy

pkgs/development/python-modules/numpy-scipy-support.nix

···
   # .test() function, which will run the test suite.
   checkPhase = ''
     runHook preCheck
-
-    _python=${python}/bin/${python.executable}
-
-    # We will "install" into a temp directory, so that we can run the
-    # tests (see below).
-    install_dir="$TMPDIR/test_install"
-    install_lib="$install_dir/lib/${python.libPrefix}/site-packages"
-    mkdir -p $install_dir
-    $_python setup.py install \
-      --install-lib=$install_lib \
-      --old-and-unmanageable \
-      --prefix=$install_dir > /dev/null
-
-    # Create a directory in which to run tests (you get an error if you try to
-    # import the package when you're in the current directory).
-    mkdir $TMPDIR/run_tests
-    pushd $TMPDIR/run_tests > /dev/null
-    # Temporarily add the directory we installed in to the python path
-    # (not permanently, or this pythonpath will wind up getting exported),
-    # and run the test suite.
-    PYTHONPATH="$install_lib:$PYTHONPATH" $_python -c \
-      'import ${pkgName}; ${pkgName}.test("fast", verbose=10)'
-    popd > /dev/null
-
+    pushd dist
+    ${python.interpreter} -c 'import ${pkgName}; ${pkgName}.test("fast", verbose=10)'
+    popd
     runHook postCheck
   '';
 

pkgs/top-level/python-packages.nix

···
 
     inherit (support) preBuild checkPhase;
 
-    setupPyBuildFlags = ["-i" "--fcompiler='gnu95'"];
-
     buildInputs = [ pkgs.gfortran self.nose ];
     propagatedBuildInputs = [ support.openblas ];