diff --git a/.github/workflows/auto-approve-own-prs.yml b/.github/workflows/auto-approve-own-prs.yml
deleted file mode 100644
index 4e1b5cfd..00000000
--- a/.github/workflows/auto-approve-own-prs.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: auto-approve
-
-on:
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  auto-approve:
-    runs-on: ubuntu-latest
-    if: github.event_name == 'pull_request' && github.event.pull_request.user.login == github.repository_owner
-    permissions:
-      pull-requests: write
-    steps:
-    - uses: actions/checkout@v4
-    - name: Auto-approve PR
-      run: gh pr review ${{ github.event.pull_request.number }} --approve
-      env:
-        GITHUB_TOKEN: ${{ github.token }}
diff --git a/.github/workflows/check-spv.yml b/.github/workflows/check-spv.yml
index 9947843a..432e01f8 100644
--- a/.github/workflows/check-spv.yml
+++ b/.github/workflows/check-spv.yml
@@ -12,18 +12,10 @@ env:
 
 jobs:
   check-spv:
-    runs-on: ubuntu-latest
+    runs-on: native
     steps:
     - uses: actions/checkout@v2
-    - name: Show env
-      run: |
-        uname -a
-        ldd --version
-    - name: Install
-      run: |
-        curl https://sh.rustup.rs -sSf | sh -s -- -y
-        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
     - name: Check
       run: |
-        cargo run --manifest-path compile-shaders/Cargo.toml -p compile-shaders-core
+        nix develop . --command cargo run --manifest-path compile-shaders/Cargo.toml -p compile-shaders-core
         git diff --exit-code
diff --git a/.github/workflows/publish-page.yml b/.github/workflows/publish-page.yml
deleted file mode 100644
index e69248d0..00000000
--- a/.github/workflows/publish-page.yml
+++ /dev/null
@@ -1,40 +0,0 @@
-name: publish-page
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v6
-      - name: Install mdbook
-        run: |
-          VERSION=0.5.2
-          URL=https://github.com/rust-lang/mdBook/releases/download/v${VERSION}/mdbook-v${VERSION}-x86_64-unknown-linux-gnu.tar.gz
-          mkdir mdbook
-          curl -sSL $URL | tar -xz --directory=mdbook
-      - name: Create root
-        run: |
-          mkdir page
-      - name: Build book
-        run: |
-          cd book
-          ../mdbook/mdbook build
-          mv book ../page
-      - uses: actions/upload-pages-artifact@v4
-        with:
-          path: page
-  publish:
-    runs-on: ubuntu-latest
-    needs: build
-    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
-    permissions:
-      pages: write
-      id-token: write
-    steps:
-      - uses: actions/deploy-pages@v4
diff --git a/.github/workflows/rustfmt.yml b/.github/workflows/rustfmt.yml
index a306a676..148fa93a 100644
--- a/.github/workflows/rustfmt.yml
+++ b/.github/workflows/rustfmt.yml
@@ -12,17 +12,8 @@ env:
 
 jobs:
   rustfmt:
-    runs-on: ubuntu-latest
+    runs-on: native
     steps:
     - uses: actions/checkout@v2
-    - name: Show env
-      run: |
-        uname -a
-        ldd --version
-    - name: Install
-      run: |
-        curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain nightly
-        rustup toolchain install nightly --allow-downgrade -c rustfmt
-        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
     - name: Check
-      run: cargo +nightly fmt -- --check
+      run: nix develop .#dev --command cargo fmt -- --check
diff --git a/.github/workflows/toml-spec.yml b/.github/workflows/toml-spec.yml
index a00fa052..fa287ad1 100644
--- a/.github/workflows/toml-spec.yml
+++ b/.github/workflows/toml-spec.yml
@@ -12,20 +12,11 @@ env:
 
 jobs:
   toml-spec:
-    runs-on: ubuntu-latest
+    runs-on: native
     steps:
     - uses: actions/checkout@v2
-    - name: Show env
-      run: |
-        uname -a
-        ldd --version
-    - name: Install
-      run: |
-        curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain nightly
-        rustup toolchain install nightly --allow-downgrade -c rustfmt
-        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
     - name: Check
       run: |
         cd toml-spec
-        cargo run
+        nix develop .. --command cargo run
         git diff --exit-code