diff --git a/.forgejo/workflows/eval-nodes.yaml b/.forgejo/workflows/eval-nodes.yaml
index e838430..9a00c90 100644
--- a/.forgejo/workflows/eval-nodes.yaml
+++ b/.forgejo/workflows/eval-nodes.yaml
@@ -7,231 +7,378 @@ jobs:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: ap01
+      name: Eval ap01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build ap01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache ap01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache ap01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   bridge01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: bridge01
+      name: Eval bridge01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build bridge01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache bridge01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache bridge01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   build01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: build01
+      name: Eval build01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build build01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache build01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache build01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   cof02:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: cof02
+      name: Eval cof02
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build cof02
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache cof02
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache cof02
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   compute01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: compute01
+      name: Eval compute01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build compute01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache compute01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache compute01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   geo01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: geo01
+      name: Eval geo01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build geo01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache geo01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache geo01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   geo02:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: geo02
+      name: Eval geo02
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build geo02
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache geo02
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache geo02
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   hypervisor01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: hypervisor01
+      name: Eval hypervisor01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build hypervisor01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache hypervisor01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache hypervisor01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   hypervisor02:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: hypervisor02
+      name: Eval hypervisor02
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build hypervisor02
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache hypervisor02
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache hypervisor02
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   hypervisor03:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: hypervisor03
+      name: Eval hypervisor03
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build hypervisor03
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache hypervisor03
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache hypervisor03
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   netaccess01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: netaccess01
+      name: Eval netaccess01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build netaccess01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache netaccess01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache netaccess01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   netcore00:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: netcore00
+      name: Eval netcore00
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build netcore00
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache netcore00
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache netcore00
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   netcore01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: netcore01
+      name: Eval netcore01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build netcore01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache netcore01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache netcore01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   netcore02:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: netcore02
+      name: Eval netcore02
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build netcore02
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache netcore02
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache netcore02
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   rescue01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: rescue01
+      name: Eval rescue01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build rescue01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache rescue01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache rescue01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   storage01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: storage01
+      name: Eval storage01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build storage01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache storage01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache storage01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   tower01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: tower01
+      name: Eval tower01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build tower01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache tower01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache tower01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   vault01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: vault01
+      name: Eval vault01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build vault01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache vault01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache vault01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   web01:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: web01
+      name: Eval web01
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build web01
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache web01
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache web01
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   web02:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: web02
+      name: Eval web02
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build web02
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache web02
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache web02
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
   web03:
     runs-on: nix
     steps:
     - uses: actions/checkout@v3
     - env:
         BUILD_NODE: web03
+      name: Eval web03
+      run: "nix-shell -A eval-nodes --run 'DRV=\"$(instantiate-node)\"\necho \"DRV=$DRV\"\
+        \ >> $GITHUB_ENV\n'"
+    - name: Build web03
+      run: "STORE_PATH=\"$(nix-store --realise \"$DRV\")\"\necho \"STORE_PATH=$STORE_PATH\"\
+        \ >> $GITHUB_ENV\n"
+    - env:
         STORE_ENDPOINT: https://tvix-store.dgnum.eu/infra-signing/
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
-      name: Build and cache web03
-      run: nix-shell -A eval-nodes --run cache-node
+      name: Cache web03
+      run: "nix-shell -A eval-nodes --run 'push-to-cache \"$STORE_PATH\"\n'"
 name: Build all the nodes
 on:
   pull_request:
diff --git a/default.nix b/default.nix
index e9f0c4a..f57333d 100644
--- a/default.nix
+++ b/default.nix
@@ -250,7 +250,10 @@ in
     passthru = mapAttrs (name: value: pkgs.mkShell (value // { inherit name; })) {
       pre-commit.shellHook = git-checks.shellHook;
       check-workflows.shellHook = workflows.shellHook;
-      eval-nodes.packages = [ scripts.cache-node ];
+      eval-nodes.packages = [
+        scripts.instantiate-node
+        scripts.push-to-cache
+      ];
       eval-shell.packages = [ scripts.nix-build-and-cache ];
       npins-shell.packages = [ pkgs.npins ];
     };
diff --git a/scripts/cache-node.sh b/scripts/cache-node.sh
index fab3636..68d1007 100755
--- a/scripts/cache-node.sh
+++ b/scripts/cache-node.sh
@@ -8,31 +8,5 @@ set -o nounset
 set -o pipefail
 shopt -s lastpipe
 
-# Remove the `nixpkgs=` default input.
-export NIX_PATH="nixpkgs="
-
-system_type="$(colmena eval -E "{ nodes, ... }: nodes.${BUILD_NODE}.config.deployment.systemType" --show-trace)"
-# Get rid of surrounding quotes.
-system_type="${system_type%\"}"
-system_type="${system_type#\"}"
-
-case "$system_type" in
-  nixos)
-    toplevel_path="config.system.build.toplevel"
-    ;;
-  zyxel-nwa50ax)
-    toplevel_path="config.system.outputs.zyxel-nwa-fit"
-    ;;
-  netconf)
-    toplevel_path="config.netconf.rpc"
-    ;;
-  *)
-    echo "Unsupported system type '$system_type' for caching; add an entry in 'scripts/cache-node.sh'"
-    exit 1
-    ;;
-esac
-
-drv=$(colmena eval --instantiate -E "{ nodes, ... }: nodes.${BUILD_NODE}.${toplevel_path}" --show-trace)
-
 # Build the derivation and send it to the great beyond
-push-to-cache "$(nix-store --realise "$drv")"
+push-to-cache "$(nix-store --realise "$(instantiate-node)")"
diff --git a/scripts/default.nix b/scripts/default.nix
index 6a021ff..6c1d38b 100644
--- a/scripts/default.nix
+++ b/scripts/default.nix
@@ -20,8 +20,9 @@ let
     ;
 
   scripts = {
+    instantiate-node = [ colmena ];
     cache-node = [
-      colmena
+      self.instantiate-node
       self.push-to-cache
     ];
     push-to-cache = [ ];
diff --git a/scripts/instantiate-node.sh b/scripts/instantiate-node.sh
new file mode 100755
index 0000000..7087dee
--- /dev/null
+++ b/scripts/instantiate-node.sh
@@ -0,0 +1,35 @@
+# SPDX-FileCopyrightText: 2024 Ryan Lahfa <ryan.lahfa@dgnum.eu>
+# SPDX-FileCopyrightText: 2024 Tom Hubrecht <tom.hubrecht@dgnum.eu>
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+set -o errexit
+set -o nounset
+set -o pipefail
+shopt -s lastpipe
+
+# Remove the `nixpkgs=` default input.
+export NIX_PATH="nixpkgs="
+
+system_type="$(colmena eval -E "{ nodes, ... }: nodes.${BUILD_NODE}.config.deployment.systemType" --show-trace)"
+# Get rid of surrounding quotes.
+system_type="${system_type%\"}"
+system_type="${system_type#\"}"
+
+case "$system_type" in
+  nixos)
+    toplevel_path="config.system.build.toplevel"
+    ;;
+  zyxel-nwa50ax)
+    toplevel_path="config.system.outputs.zyxel-nwa-fit"
+    ;;
+  netconf)
+    toplevel_path="config.netconf.rpc"
+    ;;
+  *)
+    echo "Unsupported system type '$system_type' for caching; add an entry in 'scripts/cache-node.sh'"
+    exit 1
+    ;;
+esac
+
+colmena eval --instantiate -E "{ nodes, ... }: nodes.${BUILD_NODE}.${toplevel_path}" --show-trace
diff --git a/workflows/eval-nodes.nix b/workflows/eval-nodes.nix
index 4a591e1..6dc741e 100644
--- a/workflows/eval-nodes.nix
+++ b/workflows/eval-nodes.nix
@@ -22,16 +22,36 @@ in
     steps = [
       { uses = "actions/checkout@v3"; }
       {
-        name = "Build and cache ${node}";
+        name = "Eval ${node}";
         run = nix-actions.lib.nix-shell {
-          script = "cache-node";
+          script = ''
+            DRV="$(instantiate-node)"
+            echo "DRV=$DRV" >> $GITHUB_ENV
+          '';
+          shell = "eval-nodes";
+        };
+        env.BUILD_NODE = node;
+      }
+      {
+        name = "Build ${node}";
+        run = # bash
+          ''
+            STORE_PATH="$(nix-store --realise "$DRV")"
+            echo "STORE_PATH=$STORE_PATH" >> $GITHUB_ENV
+          '';
+      }
+      {
+        name = "Cache ${node}";
+        run = nix-actions.lib.nix-shell {
+          script = ''
+            push-to-cache "$STORE_PATH"
+          '';
           shell = "eval-nodes";
         };
         env = {
           STORE_ENDPOINT = "https://tvix-store.dgnum.eu/infra-signing/";
           STORE_USER = "admin";
           STORE_PASSWORD = nix-actions.lib.secret "STORE_PASSWORD";
-          BUILD_NODE = node;
         };
       }
     ];