diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 94fec9d..63c155b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,42 +6,42 @@ on:
       - master
 
 env:
-  CURRENT_STABLE_CHANNEL: nixpkgs-24.11-darwin
+  NIXPKGS_BRANCH: nixpkgs-unstable
+  NIX_DARWIN_BRANCH: master
+  NIX_VERSION: 2.24.11
 
 jobs:
+  # The `test-stable` and `install-against-stable` job names are
+  # load‐bearing, despite their inaccuracy on the unstable branch, as
+  # they are set as required checks in the repository configuration,
+  # which only repository admins can change.
+  #
+  # TODO: Change them once the repository configuration is updated.
+
   test-stable:
     runs-on: macos-13
     steps:
     - uses: actions/checkout@v4
-    - name: Install nix corresponding to latest stable channel
+    - name: Install Nix
       uses: cachix/install-nix-action@v30
       with:
-        install_url: https://releases.nixos.org/nix/nix-2.18.8/install
-    - run: nix flake check --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
-
-  test-unstable:
-    runs-on: macos-13
-    steps:
-    - uses: actions/checkout@v4
-    - name: Install nix from current unstable channel
-      uses: cachix/install-nix-action@v30
-      with:
-        install_url: https://releases.nixos.org/nix/nix-2.24.9/install
-    - run: nix flake check --override-input nixpkgs nixpkgs/nixpkgs-unstable
+        install_url: https://releases.nixos.org/nix/nix-${{ env.NIX_VERSION }}/install
+    - run: nix flake check --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}
 
   install-against-stable:
     runs-on: macos-13
+    timeout-minutes: 30
     steps:
     - uses: actions/checkout@v4
-    - name: Install nix corresponding to latest stable channel
+    - name: Install Nix
       uses: cachix/install-nix-action@v30
       with:
-        install_url: https://releases.nixos.org/nix/nix-2.18.8/install
-        nix_path: nixpkgs=channel:${{ env.CURRENT_STABLE_CHANNEL }}
+        install_url: https://releases.nixos.org/nix/nix-${{ env.NIX_VERSION }}/install
+        nix_path: nixpkgs=channel:${{ env.NIXPKGS_BRANCH }}
     - name: Install channels
       run: |
-        nix-channel --add https://github.com/LnL7/nix-darwin/archive/master.tar.gz darwin
-        nix-channel --add https://nixos.org/channels/${{ env.CURRENT_STABLE_CHANNEL }} nixpkgs
+        nix-channel --add https://github.com/LnL7/nix-darwin/archive/${{ env.NIX_DARWIN_BRANCH }}.tar.gz darwin
+        nix-channel --add https://nixos.org/channels/${{ env.NIXPKGS_BRANCH }} nixpkgs
         nix-channel --update
     - name: Install nix-darwin
       run: |
@@ -75,71 +75,20 @@ jobs:
         # `cachix/install-nix-action` but not by our default config above
         nix run .#darwin-uninstaller \
           --extra-experimental-features "nix-command flakes" \
-          --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
+          --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}
         nix run .#darwin-uninstaller.tests.uninstaller \
           --extra-experimental-features "nix-command flakes" \
-          --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
+          --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}
 
-  install-against-unstable:
+  install-flake:
     runs-on: macos-13
     timeout-minutes: 30
     steps:
     - uses: actions/checkout@v4
-    - name: Install nix from current unstable channel
+    - name: Install Nix
       uses: cachix/install-nix-action@v30
       with:
-        install_url: https://releases.nixos.org/nix/nix-2.24.9/install
-        nix_path: nixpkgs=channel:nixpkgs-unstable
-    - name: Install channels
-      run: |
-        nix-channel --add https://github.com/LnL7/nix-darwin/archive/master.tar.gz darwin
-        nix-channel --add https://nixos.org/channels/nixpkgs-unstable nixpkgs
-        nix-channel --update
-    - name: Install nix-darwin
-      run: |
-        export NIX_PATH=$HOME/.nix-defexpr/channels
-
-        mkdir -p ~/.config/nix-darwin
-        cp modules/examples/simple.nix ~/.config/nix-darwin/configuration.nix
-
-        nixConfHash=$(shasum -a 256 /etc/nix/nix.conf | cut -d ' ' -f 1)
-        /usr/bin/sed -i.bak \
-          "s/# programs.fish.enable = true;/nix.settings.access-tokens = [ \"github.com=\${{ secrets.GITHUB_TOKEN }}\" ]; environment.etc.\"nix\/nix.conf\".knownSha256Hashes = [ \"$nixConfHash\" ];/" \
-          ~/.config/nix-darwin/configuration.nix
-
-        nix run .#darwin-rebuild \
-          -- switch \
-          -I darwin-config=$HOME/.config/nix-darwin/configuration.nix
-    - name: Switch to new configuration
-      run: |
-        . /etc/bashrc
-
-        /usr/bin/sed -i.bak \
-          "s/pkgs.vim/pkgs.hello/" \
-          ~/.config/nix-darwin/configuration.nix
-
-        darwin-rebuild switch -I darwin=.
-
-        hello
-    - name: Test uninstallation of nix-darwin
-      run: |
-        # We need to specify `--extra-experimental-features` because `experimental-features` is set by
-        # `cachix/install-nix-action` but not by our default config above
-        nix run .#darwin-uninstaller \
-           --extra-experimental-features "nix-command flakes" \
-           --override-input nixpkgs nixpkgs/nixpkgs-unstable
-        nix run .#darwin-uninstaller.tests.uninstaller \
-           --extra-experimental-features "nix-command flakes" \
-           --override-input nixpkgs nixpkgs/nixpkgs-unstable
-
-  install-flake-against-stable:
-    runs-on: macos-13
-    steps:
-    - uses: actions/checkout@v4
-    - name: Install nix version corresponding to latest stable channel
-      uses: cachix/install-nix-action@v30
-      with:
-        install_url: https://releases.nixos.org/nix/nix-2.18.8/install
+        install_url: https://releases.nixos.org/nix/nix-${{ env.NIX_VERSION }}/install
     - name: Install nix-darwin
       run: |
         mkdir -p ~/.config/nix-darwin
@@ -157,7 +106,7 @@ jobs:
         nix run .#darwin-rebuild -- \
           switch --flake ~/.config/nix-darwin#simple \
           --override-input nix-darwin . \
-          --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
+          --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}
     - name: Switch to new configuration
       run: |
         . /etc/bashrc
@@ -168,55 +117,10 @@ jobs:
 
         darwin-rebuild switch --flake ~/.config/nix-darwin#simple \
           --override-input nix-darwin . \
-          --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
+          --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}
 
         hello
     - name: Test uninstallation of nix-darwin
       run: |
-        nix run .#darwin-uninstaller --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
-        nix run .#darwin-uninstaller.tests.uninstaller --override-input nixpkgs nixpkgs/${{ env.CURRENT_STABLE_CHANNEL }}
-
-  install-flake-against-unstable:
-    runs-on: macos-13
-    timeout-minutes: 30
-    steps:
-    - uses: actions/checkout@v4
-    - name: Install nix from current unstable channel
-      uses: cachix/install-nix-action@v30
-      with:
-        install_url: https://releases.nixos.org/nix/nix-2.24.9/install
-    - name: Install nix-darwin
-      run: |
-        mkdir -p ~/.config/nix-darwin
-        darwin=$(pwd)
-        pushd ~/.config/nix-darwin
-          nix flake init -t $darwin
-          nixConfHash=$(shasum -a 256 /etc/nix/nix.conf | cut -d ' ' -f 1)
-          /usr/bin/sed -i.bak \
-            "s/# programs.fish.enable = true;/nix.settings.access-tokens = [ \"github.com=\${{ secrets.GITHUB_TOKEN }}\" ]; environment.etc.\"nix\/nix.conf\".knownSha256Hashes = [ \"$nixConfHash\" ];/" \
-            flake.nix
-          /usr/bin/sed -i.bak \
-            's/nixpkgs.hostPlatform = "aarch64-darwin";/nixpkgs.hostPlatform = "'$(nix eval --expr builtins.currentSystem --impure --raw)'";/' \
-            flake.nix
-        popd
-        nix run .#darwin-rebuild -- \
-          switch --flake ~/.config/nix-darwin#simple \
-          --override-input nix-darwin . \
-          --override-input nixpkgs nixpkgs/nixpkgs-unstable
-    - name: Switch to new configuration
-      run: |
-        . /etc/bashrc
-
-        /usr/bin/sed -i.bak \
-          "s/pkgs.vim/pkgs.hello/" \
-          ~/.config/nix-darwin/flake.nix
-
-        darwin-rebuild switch --flake ~/.config/nix-darwin#simple \
-          --override-input nix-darwin . \
-          --override-input nixpkgs nixpkgs/nixpkgs-unstable
-
-        hello
-    - name: Test uninstallation of nix-darwin
-      run: |
-        nix run .#darwin-uninstaller --override-input nixpkgs nixpkgs/nixpkgs-unstable
-        nix run .#darwin-uninstaller.tests.uninstaller --override-input nixpkgs nixpkgs/nixpkgs-unstable
+        nix run .#darwin-uninstaller --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}
+        nix run .#darwin-uninstaller.tests.uninstaller --override-input nixpkgs nixpkgs/${{ env.NIXPKGS_BRANCH }}