diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 06464af..871e86d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,11 +1,11 @@
-name: debug_build
+name: build
 on:
   workflow_run:
     workflows: ["Test Workflow"]
     types:
       - completed
 jobs:
-  debug_build:
+  build:
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
     runs-on: ubuntu-latest
 
@@ -29,3 +29,15 @@ jobs:
           name: fastanime_debug_build
           path: |
             dist
+
+      - name: Install nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Use GitHub Action built-in cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+
+      - name: Nix Flake check (evaluation + tests)
+        run: nix flake check
+
+      - name: Build the nix derivation
+        run: nix build
diff --git a/.gitignore b/.gitignore
index 2660c5d..1c100d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -136,7 +136,6 @@ celerybeat.pid
 
 # Environments
 .env
-.envrc
 .venv
 env/
 venv/
@@ -209,3 +208,5 @@ __marimo__/
 # custom
 repomix-output.xml
 .project/
+result
+.direnv
diff --git a/shell.nix b/shell.nix
deleted file mode 100644
index 5c2fc35..0000000
--- a/shell.nix
+++ /dev/null
@@ -1,19 +0,0 @@
-let
-  pkgs = import <nixpkgs> { };
-in
-pkgs.mkShell {
-  packages = [
-    (pkgs.python3.withPackages (python-pkgs: [
-      python-pkgs.yt-dlp
-      python-pkgs.dbus-python
-      python-pkgs.requests
-      python-pkgs.rich
-      python-pkgs.click
-      python-pkgs.inquirerpy
-      python-pkgs.mpv
-      python-pkgs.fastapi
-      python-pkgs.thefuzz
-      python-pkgs.plyer
-    ]))
-  ];
-}