diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e0ef75f..6ee5781 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,14 +7,19 @@ jobs:
     strategy:
       matrix:
         os:
-          - ubuntu-latest
-          - macos-11
+          - label: Linux
+            image: ubuntu-latest
+          - label: macOS
+            image: macos-11
         nix:
-          - name: 2.10.3
+          - version: 2.10.3
             url: https://releases.nixos.org/nix/nix-2.10.3/install
-    runs-on: ${{ matrix.os }}
+
+    name: ${{ matrix.os.label }} + Nix ${{ matrix.nix.version }}
+    runs-on: ${{ matrix.os.image }}
     steps:
       - uses: actions/checkout@v3.0.2
+
       - uses: cachix/install-nix-action@v17
         with:
           install_url: ${{ matrix.nix.url }}
@@ -28,48 +33,15 @@ jobs:
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
 
       - run: nix flake check
-        if: ${{ !contains(matrix.nix.name, '2.3') && runner.os != 'macOS' }}
+        if: ${{ !contains(matrix.nix.version, '2.3') && runner.os != 'macOS' }}
 
       - name: Build Colmena
         run: nix build -L
-        if: ${{ !contains(matrix.nix.name, '2.3') }}
+        if: ${{ !contains(matrix.nix.version, '2.3') }}
 
       - name: Build and install Colmena with flake-compat
         run: nix-env -if default.nix
 
       - name: Build manual
         run: nix build .#manual -L
-        if: ${{ !contains(matrix.nix.name, '2.3') && runner.os != 'macOS' }}
-
-  tests:
-    strategy:
-      matrix:
-        os:
-          - ubuntu-latest
-        nix:
-          - name: 2.3.16
-            url: https://releases.nixos.org/nix/nix-2.3.16/install
-          - name: 2.4
-            url: https://releases.nixos.org/nix/nix-2.4/install
-          - name: 2.10.3
-            url: https://releases.nixos.org/nix/nix-2.10.3/install
-    runs-on: ${{ matrix.os }}
-    steps:
-      - uses: actions/checkout@v2.3.5
-      - uses: cachix/install-nix-action@v17
-        with:
-          install_url: ${{ matrix.nix.url }}
-          extra_nix_config: |
-            experimental-features = nix-command flakes
-      - uses: cachix/cachix-action@v10
-        with:
-          name: colmena
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-
-      - name: Set up pinned nixpkgs
-        run: echo "NIX_PATH=nixpkgs=$(nix-instantiate --eval flake-compat.nix -A defaultNix.inputs.nixpkgs.outPath | sed 's|\"||g')" >> $GITHUB_ENV
-
-      - run: nix-shell --run "cargo test"
-        if: ${{ !contains(matrix.nix.name, '2.3') }}
-      - run: nix-shell --run "cargo test -- --skip flake"
-        if: ${{ contains(matrix.nix.name, '2.3') }}
+        if: ${{ !contains(matrix.nix.version, '2.3') && runner.os != 'macOS' }}
diff --git a/.github/workflows/linters.yml b/.github/workflows/linters.yml
index d488ad7..4426547 100644
--- a/.github/workflows/linters.yml
+++ b/.github/workflows/linters.yml
@@ -4,17 +4,20 @@ on:
   pull_request:
   push:
 jobs:
-  build:
+  linters:
+    name: Linters
+
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
         nix:
-          - name: 2.10.3
+          - version: 2.10.3
             url: https://releases.nixos.org/nix/nix-2.10.3/install
 
     steps:
       - uses: actions/checkout@v2.3.4
+
       - uses: cachix/install-nix-action@v17
         with:
           install_url: ${{ matrix.nix.url }}
diff --git a/.github/workflows/manual-stable.yml b/.github/workflows/manual-stable.yml
index bf9cfbb..1f24d4d 100644
--- a/.github/workflows/manual-stable.yml
+++ b/.github/workflows/manual-stable.yml
@@ -10,21 +10,26 @@ on:
       - release-0.4.x
 jobs:
   deploy:
+    name: Deploy
+
     runs-on: ubuntu-latest
+    if: github.repository == 'zhaofengli/colmena'
 
     strategy:
       matrix:
         nix:
-          - name: 2.10.3
+          - version: 2.10.3
             url: https://releases.nixos.org/nix/nix-2.10.3/install
 
     steps:
       - uses: actions/checkout@v3.0.2
+
       - uses: cachix/install-nix-action@v17
         with:
           install_url: ${{ matrix.nix.url }}
           extra_nix_config: |
             experimental-features = nix-command flakes
+
       - uses: cachix/cachix-action@v10
         with:
           name: colmena
diff --git a/.github/workflows/manual.yml b/.github/workflows/manual.yml
index 46581d6..222d63f 100644
--- a/.github/workflows/manual.yml
+++ b/.github/workflows/manual.yml
@@ -10,7 +10,10 @@ on:
       - completed
 jobs:
   deploy-unstable:
+    name: Deploy
+
     runs-on: ubuntu-latest
+    if: github.repository == 'zhaofengli/colmena'
 
     strategy:
       matrix:
@@ -20,11 +23,13 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3.0.2
+
       - uses: cachix/install-nix-action@v17
         with:
           install_url: ${{ matrix.nix.url }}
           extra_nix_config: |
             experimental-features = nix-command flakes
+
       - uses: cachix/cachix-action@v10
         with:
           name: colmena
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..428253b
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,42 @@
+name: Tests
+on:
+  pull_request:
+  push:
+jobs:
+  tests:
+    strategy:
+      matrix:
+        os:
+          - label: Linux
+            image: ubuntu-latest
+        nix:
+          - version: 2.3.16
+            url: https://releases.nixos.org/nix/nix-2.3.16/install
+          - version: 2.4
+            url: https://releases.nixos.org/nix/nix-2.4/install
+          - version: 2.10.3
+            url: https://releases.nixos.org/nix/nix-2.10.3/install
+
+    name: ${{ matrix.os.label }} + Nix ${{ matrix.nix.version }}
+    runs-on: ${{ matrix.os.image }}
+    steps:
+      - uses: actions/checkout@v2.3.5
+
+      - uses: cachix/install-nix-action@v17
+        with:
+          install_url: ${{ matrix.nix.url }}
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+
+      - uses: cachix/cachix-action@v10
+        with:
+          name: colmena
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
+      - name: Set up pinned nixpkgs
+        run: echo "NIX_PATH=nixpkgs=$(nix-instantiate --eval flake-compat.nix -A defaultNix.inputs.nixpkgs.outPath | sed 's|\"||g')" >> $GITHUB_ENV
+
+      - run: nix-shell --run "cargo test"
+        if: ${{ !contains(matrix.nix.version, '2.3') }}
+      - run: nix-shell --run "cargo test -- --skip flake"
+        if: ${{ contains(matrix.nix.version, '2.3') }}