use scikit_build_core as build system

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "auto-opt-cpp";
+  description = "slopefit";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
@@ -16,66 +16,24 @@
       system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        pkg =
-          {
-            stdenv,
-            cmake,
-            ninja,
-            lib,
-            eigen,
-            gtest,
-            python313,
-            python313Packages,
-            withTests ? false,
-          }:
-          let
-            fs = lib.fileset;
-          in
-          stdenv.mkDerivation {
-            pname = "autoopt-cpp";
-            version = "0.1.0";
-
-            src = fs.toSource {
-              root = ./.;
-              fileset = fs.unions [
-                ./include
-                ./CMakeLists.txt
-                ./tests
-                ./src
-                ./pysrc
-              ];
-            };
-
-            buildInputs = lib.optionals withTests [ gtest ];
-
-            nativeBuildInputs = [
-              cmake
-              ninja
-              eigen
-              (python313.withPackages (
-                ps: with ps; [
-                  nanobind
-                  matplotlib
-                  numpy
-                ]
-              ))
-            ];
-          };
+        pkg = import ./build.nix;
       in
       rec {
         packages = rec {
-          autoopt-cpp = pkgs.callPackage pkg { };
-          autoopt-cpp-with-tests = pkgs.callPackage pkg { withTests = true; };
-          default = autoopt-cpp;
+          slopefit = pkgs.callPackage pkg { };
+          slopefit-with-tests = pkgs.callPackage pkg { };
+          default = slopefit;
         };
         devShells = {
           default = pkgs.mkShell {
             inputsFrom = [
-              packages.autoopt-cpp-with-tests
+              packages.slopefit-with-tests
             ];
 
+            buildInputs = [ pkgs.python3Packages.pip ];
+
             shellHook = ''
-              echo "Development shell for autoopt-cpp"
+              echo "Development shell for slopefit"
             '';
           };
         };