wip: include the necessary scikit-learn patch

Not working yet, the patch does not take effect on the poetry package
and mixing poetry & nixpkgs packages causes all sorts of issues.

shell.nix

@@ -8,10 +8,11 @@
 , pkgs ? import pkgsPath {}
 }:
 let
+  python = pkgs.python37;
   pythonEnv = pkgs.poetry2nix.mkPoetryEnv { 
     projectDir = ./.;
     # For tensorflow 1.15 https://github.com/nix-community/poetry2nix/issues/180
-    python = pkgs.python37;
+    python = python;
     overrides = pkgs.poetry2nix.overrides.withDefaults (self: super: {
       # https://github.com/nix-community/poetry2nix/issues/166
       sphinx-rtd-theme = super.sphinx_rtd_theme;
@@ -21,11 +22,44 @@ let
           buildInputs = with pkgs; [ xorg.libX11 ] ++ old.buildInputs;
         }
       );
+      # scikit-learn = super.scikitlearn.overridePythonAttrs (
+      scikit-learn = python.pkgs.scikitlearn.overridePythonAttrs (
+        old: {
+          # src = pkgs.fetchFromGitHub {
+          #   owner = "scikit-learn";
+          #   repo = "scikit-learn";
+          #   rev = "21121f50997dba43fffbfecb2f672431cf708363"; # master 2020-09-30
+          #   sha256 = "1lqlww0i4w2g4lb6ir9mnsmsnp5zga70r77j4qa9mflvxbmr4c97";
+          # };
+          # scikit-optimize
+          # Backport of https://github.com/scikit-learn/scikit-learn/pull/17936
+          # to make the estimator checks work for our case.
+          # patches = [./0001-Relax-init-parameter-type-checks.patch];
+          patches = [./0001-Relax-init-parameter-type-checks.patch];
+          # doCheck = false; # slow
+          # postPatch = ''
+          #   cat sklearn/utils/estimator_checks.py
+          #   rm -r *
+          # '';
+        }
+      );
+      numpy = python.pkgs.numpy;
+      joblib = python.pkgs.joblib;
+      # scikit-optimize = super.scikit-optimize.overridePythonAttrs (
+      #   old: {
+      #     # src = pkgs.fetchFromGitHub {
+      #     #   owner = "scikit-optimize";
+      #     #   repo = "scikit-optimize";
+      #     #   rev = "v0.8.1";
+      #     #   sha256 = "1bz8gxccx8n99abw49j8h5zf3i568g5hcf8nz1yinma8jqhxjkjh";
+      #     # };
+      #   }
+      # );
     });
   };
 in pkgs.mkShell {
   buildInputs = [
     pythonEnv
-    pkgs.python37.pkgs.poetry
+    python.pkgs.poetry
   ];
 }