diff --git a/Cargo.toml b/Cargo.toml
index 60d7a9f..5793b00 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,9 +10,6 @@ thiserror = "2.0.18"
 version = "1.30"
 default-features = false
 features = ["std", "float"]
-[dependencies.gmp-mpfr-sys]
-version = "*"
-features = ["force-cross"]
 
 [profile.release]
 lto = true
diff --git a/flake.nix b/flake.nix
index 99a051a..26109ec 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,43 +10,31 @@
     inputs.flake-utils.lib.eachDefaultSystem (
       system:
       let
-        pkgs = inputs.nixpkgs.legacyPackages.${system};
-        lib = inputs.nixpkgs.lib;
-
-        src = lib.sourceFilesBySuffices ./. [
-          "Cargo.toml"
-          "Cargo.lock"
-          ".rs"
-        ];
+        pkgs = import inputs.nixpkgs { inherit system; };
 
+        src = ./.;
         cargoToml = fromTOML (builtins.readFile "${src}/Cargo.toml");
         name = cargoToml.package.name;
 
-        bin =
-          {
-            rustPlatform,
-            m4,
-          }:
-          rustPlatform.buildRustPackage {
-            inherit name src;
+        crate = pkgs.rustPlatform.buildRustPackage {
+          inherit name src;
 
-            cargoLock.lockFile = "${src}/Cargo.lock";
+          cargoLock.lockFile = "${src}/Cargo.lock";
 
-            nativeBuildInputs = [
-              m4
-            ];
-          };
-
-        default = pkgs.callPackage bin { };
+          nativeBuildInputs = with pkgs; [
+            m4
+          ];
+        };
       in
       {
-        packages.default = default;
-        packages.static = pkgs.pkgsStatic.callPackage bin { };
+        packages.default = crate;
 
         devShells.default = pkgs.mkShell {
-          inputsFrom = [ default ];
+          inputsFrom = [ crate ];
 
           packages = with pkgs; [
+            rustc
+            cargo
             clippy
             rustfmt
             rust-analyzer