diff --git a/.github/workflows/check-deploy.yml b/.github/workflows/check-deploy.yml
index 11c4e20..3f0b87b 100644
--- a/.github/workflows/check-deploy.yml
+++ b/.github/workflows/check-deploy.yml
@@ -8,7 +8,6 @@ jobs:
     runs-on: ubuntu-latest
     outputs:
       checks: ${{ steps.checks.outputs.checks }}
-      hosts: ${{ steps.hosts.outputs.hosts }}
     steps:
       - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
@@ -18,10 +17,6 @@ jobs:
         run: |
           checks=$(nix flake show --json | jq -c '.checks."x86_64-linux" | keys')
           printf "checks=%s" "$checks" >> "$GITHUB_OUTPUT"
-      - id: hosts
-        run: |
-          hosts=$(nix flake show --json | jq -c '.nixosConfigurations | keys')
-          printf "hosts=%s" "$hosts" >> "$GITHUB_OUTPUT"
   build-check:
     needs: generate-matrix
     runs-on: ubuntu-latest
@@ -40,24 +35,6 @@ jobs:
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
           useDaemon: false
       - run: nix build .#checks.x86_64-linux.${{ matrix.check }} --print-build-logs
-  build-host:
-    needs: generate-matrix
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        host: ${{ fromJson(needs.generate-matrix.outputs.hosts) }}
-    steps:
-      - uses: actions/checkout@v5
-      - uses: cachix/install-nix-action@v31
-        with:
-          extra_nix_config: experimental-features = nix-command flakes pipe-operators
-      - uses: cachix/cachix-action@v15
-        with:
-          name: sebastian-stork
-          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
-          useDaemon: false
-      - run: nix build .#nixosConfigurations.${{ matrix.host }}.config.system.build.toplevel --print-build-logs
   flake-check:
     needs: build-check
     runs-on: ubuntu-latest
@@ -72,7 +49,7 @@ jobs:
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
       - run: nix flake check --keep-going --print-build-logs
   deploy:
-    needs: [build-host, flake-check]
+    needs: flake-check
     runs-on: ubuntu-latest
     permissions:
       contents: write
diff --git a/profiles/core.nix b/profiles/core.nix
index 7690326..6fb7510 100644
--- a/profiles/core.nix
+++ b/profiles/core.nix
@@ -41,11 +41,6 @@
 
         min-free = 4 * 1024 * 1024 * 1024;
         max-free = 6 * 1024 * 1024 * 1024;
-
-        substituters = [ "https://sebastian-stork.cachix.org" ];
-        trusted-public-keys = [
-          "sebastian-stork.cachix.org-1:PAgwmtq5BF/UlUoXdBC2sX2EKZQ2vCjo3iGySujbaME="
-        ];
       };
     };