diff --git a/.github/workflows/clippy.yml b/.github/workflows/clippy.yml
index 78eaab8..1303e95 100644
--- a/.github/workflows/clippy.yml
+++ b/.github/workflows/clippy.yml
@@ -14,12 +14,13 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: nightly
-            components: clippy
-            targets: ${{ env.TARGET }}
-      - run: cd riscv64_qemuvirt && cargo clippy --all-features --target ${{ env.TARGET }}
+      - uses: cachix/install-nix-action@v27
+
+      - name: Run clippy
+        run: nix develop --command sh -c "
+          cd riscv64_qemuvirt &&
+          cargo clippy --all-features --target ${{ env.TARGET }}
+          "
 
   clippy_aarch64:
     runs-on: ubuntu-latest
@@ -28,9 +29,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: nightly
-            components: clippy
-            targets: ${{ env.TARGET }}
-      - run: cd aarch64_qemuvirt && cargo clippy --all-features --target ${{ env.TARGET }}
+      - uses: cachix/install-nix-action@v27
+
+      - name: Run clippy
+        run: nix develop --command sh -c "
+          cd aarch64_qemuvirt &&
+          cargo clippy --all-features --target ${{ env.TARGET }}
+          "
diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index ac6c62d..ec052c9 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -14,13 +14,13 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: nightly
-            targets: ${{ env.TARGET }}
+      - uses: cachix/install-nix-action@v27
 
       - name: Build doc
-        run: cd kernel && cargo doc --target ${{ env.TARGET }} --all-features
+        run: nix develop --command sh -c "
+          cd kernel &&
+          cargo doc --target ${{ env.TARGET }} --all-features
+          "
 
   doc_aarch64:
     runs-on: ubuntu-latest
@@ -29,10 +29,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: nightly
-            targets: ${{ env.TARGET }}
+      - uses: cachix/install-nix-action@v27
 
       - name: Build doc
-        run: cd kernel && cargo doc --target ${{ env.TARGET }} --all-features
\ No newline at end of file
+        run: nix develop --command sh -c "
+          cd kernel &&
+          cargo doc --target ${{ env.TARGET }} --all-features
+          "
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index c8d733f..8d5abf2 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -13,11 +13,9 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: actions-rs/toolchain@v1
-        with:
-            toolchain: nightly
-            components: rustfmt
-            override: true
+      - uses: cachix/install-nix-action@v27
 
       - name: Format
-        run: cargo fmt -- --check
+        run: nix develop --command sh -c "
+          cargo fmt -- --check
+          "
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 55d48c3..581f20a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,36 +9,29 @@ on:
 jobs:
   test_riscv64:
     runs-on: ubuntu-latest
-    env:
-      TARGET: riscv64gc-unknown-none-elf
     steps:
       - uses: actions/checkout@v2
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: nightly
-            components: clippy
-            targets: ${{ env.TARGET }}
+      - uses: cachix/install-nix-action@v27
 
-      - name: Install qemu
-        run: sudo apt-get update && sudo apt-get install qemu-system-misc opensbi
-
-      - run: cd riscv64_qemuvirt && cargo run -F launch_tests
+      - name: Run tests
+        run: nix develop --command sh -c "
+          cd riscv64_qemuvirt &&
+          cargo run -F launch_tests
+          "
 
   test_aarch64:
     runs-on: ubuntu-latest
-    env:
-      TARGET: aarch64-unknown-none
     steps:
       - uses: actions/checkout@v2
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-            toolchain: nightly
-            components: clippy
-            targets: ${{ env.TARGET }}
+      - uses: cachix/install-nix-action@v27
 
-      - name: Install qemu
-        run: sudo apt-get update && sudo apt-get install qemu-system-arm
+      - name: Enter nix
+        run: nix develop
 
-      - run: cd aarch64_qemuvirt && cargo run -F launch_tests
+      - name: Run tests
+        run: nix develop --command sh -c "
+          cd aarch64_qemuvirt &&
+          cargo run -F launch_tests
+          "