diff --git a/.forgejo/workflows/build.yaml b/.forgejo/workflows/build.yaml
index df99da1..c8ffb62 100644
--- a/.forgejo/workflows/build.yaml
+++ b/.forgejo/workflows/build.yaml
@@ -6,7 +6,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
     - name: alejandra -c .
-      run: 'nix develop -c alejandra -c .'
+      run: 'nix shell nixpkgs#alejandra -c alejandra -c .'
 
   build:
     runs-on: beefcake
@@ -22,7 +22,7 @@ jobs:
         key: ${{ runner.os }}-build
 
     - name: cargo build
-      run: 'nix develop -c cargo build'
+      run: 'nix develop .#rust-build -c cargo build'
 
   test:
     runs-on: beefcake
@@ -45,7 +45,7 @@ jobs:
         key: ${{ runner.os }}-build
 
     - name: cargo test
-      run: 'nix develop -c cargo test'
+      run: 'nix develop .#rust-build -c cargo test'
 
   formatting-rust:
     runs-on: beefcake
@@ -61,7 +61,7 @@ jobs:
         key: ${{ runner.os }}-formatting
 
     - name: cargo fmt --check
-      run: 'nix develop -c cargo fmt --check'
+      run: 'nix develop .#rust-build -c cargo fmt --check'
 
   lint:
     runs-on: beefcake
@@ -77,4 +77,4 @@ jobs:
         key: ${{ runner.os }}-lint
 
     - name: cargo clippy
-      run: 'nix develop -c cargo clippy'
+      run: 'nix develop .#rust-build -c cargo clippy'
diff --git a/flake.nix b/flake.nix
index 4994d0b..36be787 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,29 +45,33 @@
     devShells = forEachSupportedSystem (system: let
       pkgs = import nixpkgs {inherit system;};
     in {
+      rust-build = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          cargo
+          rustc
+          rustfmt
+          rustPackages.clippy
+          rust-analyzer
+
+          # linker
+          clang
+          mold
+
+          # debugger
+          lldb
+
+          # libs
+          libopus
+          openssl
+          pkg-config
+        ];
+      };
+
       rust-dev = pkgs.mkShell {
         inherit (outputs.checks.${system}.pre-commit-check) shellHook;
 
-        buildInputs = with pkgs;
-          [
-            cargo
-            rustc
-            rustfmt
-            rustPackages.clippy
-            rust-analyzer
-
-            # linker
-            clang
-            mold
-
-            # debugger
-            lldb
-
-            # libs
-            libopus
-            openssl
-            pkg-config
-          ]
+        buildInputs =
+          outputs.devShells.${system}.rust-build.buildInputs
           ++ outputs.checks.${system}.pre-commit-check.enabledPackages;
       };