python3Packages.python-sat: fix on darwin

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

@@ -15,6 +15,19 @@ buildPythonPackage rec {
 
   checkInputs = [ pytestCheckHook ];
 
+  # https://github.com/pysathq/pysat/pull/102
+  postPatch = ''
+    # Fix for case-insensitive filesystem
+    cat >>solvers/patches/cadical.patch <<EOF
+diff --git solvers/cadical/VERSION solvers/cdc/VERSION
+deleted file mode 100644
+--- solvers/cadical/VERSION
++++ /dev/null
+@@ -1 +0,0 @@
+-1.0.3
+EOF
+  '';
+
   meta = with lib; {
     description = "Toolkit to provide interface for various SAT (without optional dependancy py-aiger-cnf)";
     homepage = "https://github.com/pysathq/pysat";