diff --git a/.github/workflows/build-machines-and-homes.yml b/.github/workflows/build-machines-and-homes.yml
index 79f3f7b..4835bb6 100644
--- a/.github/workflows/build-machines-and-homes.yml
+++ b/.github/workflows/build-machines-and-homes.yml
@@ -77,7 +77,7 @@ jobs:
         run: |
           package=".#nixosConfigurations."${{ matrix.machine }}".config.system.build.toplevel"
           nix run git+https://git.cy7.sh/cy/nixcp.git -- \
-            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem' \
+            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem&compression=none' \
             -u https://nix-community.cachix.org \
             -u https://nixcache.web.cy7.sh \
             $package
@@ -149,7 +149,7 @@ jobs:
         run: |
           package=".#homeConfigurations."${{ matrix.home }}".activationPackage"
           nix run git+https://git.cy7.sh/cy/nixcp.git -- \
-            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem' \
+            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem&compression=none' \
             -u https://nix-community.cachix.org \
             -u https://nixcache.web.cy7.sh \
             $package
diff --git a/.github/workflows/build-packages.yml b/.github/workflows/build-packages.yml
index 11ebc32..57cbe0f 100644
--- a/.github/workflows/build-packages.yml
+++ b/.github/workflows/build-packages.yml
@@ -65,7 +65,7 @@ jobs:
         if: '!cancelled()'
         run: |
           nix run git+https://git.cy7.sh/cy/nixcp.git -- \
-            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem' \
+            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem&compression=none' \
             -u https://nix-community.cachix.org \
             -u https://nixcache.web.cy7.sh \
             "${{ matrix.package }}"