diff --git a/flake.nix b/flake.nix
index 5612537..8c4fe4e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,16 +17,61 @@
     inputs.flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
     let
       pkgs = (import inputs.nixpkgs { inherit system; }).extend (import inputs.rust-overlay);
-      nix-haskell = import inputs.nix-haskell { inherit system inputs; };
       crane = (inputs.crane.mkLib pkgs).overrideToolchain (p: p.rust-bin.selectLatestNightlyWith (
         toolchain: toolchain.default.override {
           extensions = [ "rust-src" ];
           targets = [ "x86_64-unknown-linux-gnu" ];
         }
       ));
-      project =
-        (nix-haskell (import ./project.nix { inherit (inputs) hls-src hs-bindgen-src libclang-src; inherit garnet-rs; })
-        ).project.haskell-nix;
+      project = (import inputs.nix-haskell { inherit system inputs; } {
+        name = "garnet";
+        src = ./.;
+        compiler-nix-name = "ghc914";
+        source-repository-packages = {
+          # not on Hackage yet: https://well-typed.com/blog/2026/02/hs-bindgen-alpha
+          # we're using more recent versions than in that post, because we want record-dot support:
+          # https://github.com/well-typed/hs-bindgen/issues/1829#issuecomment-4081875451
+          c-expr-dsl = inputs.hs-bindgen-src + "/c-expr-dsl";
+          c-expr-runtime = inputs.hs-bindgen-src + "/c-expr-runtime";
+          hs-bindgen = inputs.hs-bindgen-src + "/hs-bindgen";
+          hs-bindgen-runtime = inputs.hs-bindgen-src + "/hs-bindgen-runtime";
+          libclang-bindings = inputs.libclang-src;
+        };
+        overrides = [
+          ({ pkgs, ... }: {
+            packages.libclang-bindings.components.library = {
+              build-tools = [ pkgs.llvmPackages.llvm ];
+              libs = [ pkgs.llvmPackages.libclang ];
+            };
+          })
+          (_: {
+            packages.garnet.components.library = {
+              preConfigure = ''
+                mkdir -p rust/target/debug
+                ln -s ${garnet-rs}/include/garnet_rs.h rust/target/debug/garnet_rs.h
+                ln -s ${garnet-rs}/lib/libCgarnet_rs.a rust/target/debug/libCgarnet_rs.a
+              '';
+              preInstall = ''
+                cp ${garnet-rs}/lib/libCgarnet_rs.a dist/build/libCgarnet_rs.a
+              '';
+              configureFlags = [ "--extra-lib-dirs=${garnet-rs}/lib" ];
+            };
+          })
+        ];
+        shell = {
+          tools = {
+            cabal = "latest";
+            haskell-language-server = {
+              src = inputs.hls-src;
+              sha256map = {
+                "https://github.com/snowleopard/alga"."d4e43fb42db05413459fb2df493361d5a666588a" = "0s1mlnl64wj7pkg3iipv5bb4syy3bhxwqzqv93zqlvkyfn64015i";
+              };
+            };
+          };
+          withHoogle = false;
+          withHaddock = true;
+        };
+      }).project.haskell-nix;
       garnet-rs = crane.buildPackage {
         src = crane.cleanCargoSource ./rust;
         doCheck = false;
diff --git a/project.nix b/project.nix
deleted file mode 100644
index ffcffbe..0000000
--- a/project.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{ hls-src
-, hs-bindgen-src
-, libclang-src
-, garnet-rs
-}:
-{
-  name = "garnet";
-  src = ./.;
-  compiler-nix-name = "ghc914";
-  source-repository-packages = {
-    # not on Hackage yet: https://well-typed.com/blog/2026/02/hs-bindgen-alpha
-    # we're using more recent versions than in that post, because we want record-dot support:
-    # https://github.com/well-typed/hs-bindgen/issues/1829#issuecomment-4081875451
-    c-expr-dsl = hs-bindgen-src + "/c-expr-dsl";
-    c-expr-runtime = hs-bindgen-src + "/c-expr-runtime";
-    hs-bindgen = hs-bindgen-src + "/hs-bindgen";
-    hs-bindgen-runtime = hs-bindgen-src + "/hs-bindgen-runtime";
-    libclang-bindings = libclang-src;
-  };
-  overrides = [
-    ({ pkgs, ... }: {
-      packages.libclang-bindings.components.library = {
-        build-tools = [ pkgs.llvmPackages.llvm ];
-        libs = [ pkgs.llvmPackages.libclang ];
-      };
-    })
-    (_: {
-      packages.garnet.components.library = {
-        preConfigure = ''
-          mkdir -p rust/target/debug
-          ln -s ${garnet-rs}/include/garnet_rs.h rust/target/debug/garnet_rs.h
-          ln -s ${garnet-rs}/lib/libCgarnet_rs.a rust/target/debug/libCgarnet_rs.a
-        '';
-        preInstall = ''
-          cp ${garnet-rs}/lib/libCgarnet_rs.a dist/build/libCgarnet_rs.a
-        '';
-        configureFlags = [ "--extra-lib-dirs=${garnet-rs}/lib" ];
-      };
-    })
-  ];
-  shell = {
-    tools = {
-      cabal = "latest";
-      haskell-language-server = {
-        src = hls-src;
-        sha256map = {
-          "https://github.com/snowleopard/alga"."d4e43fb42db05413459fb2df493361d5a666588a" = "0s1mlnl64wj7pkg3iipv5bb4syy3bhxwqzqv93zqlvkyfn64015i";
-        };
-      };
-    };
-    withHoogle = false;
-    withHaddock = true;
-  };
-}