diff --git a/.github/workflows/build-machines-and-homes.yml b/.github/workflows/build-machines-and-homes.yml
index c955639..79f3f7b 100644
--- a/.github/workflows/build-machines-and-homes.yml
+++ b/.github/workflows/build-machines-and-homes.yml
@@ -47,14 +47,17 @@ jobs:
             accept-flake-config = true
             system-features = nixos-test benchmark big-parallel kvm
             secret-key-files = /home/runner/cache-priv-key.pem
-            extra-substituters = https://nixcache.cy7.sh https://cache.lix.systems
-            extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8= cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=
+            extra-substituters = https://nixcache.cy7.sh
+            extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8=
 
       - name: Install Lix
         run: |
           sudo --preserve-env=PATH $(which nix) run \
+          --experimental-features "nix-command flakes" \
+          --extra-substituters https://cache.lix.systems --extra-trusted-public-keys "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=" \
           'git+https://git.lix.systems/lix-project/lix?ref=refs/tags/2.92.0' -- \
-          upgrade-nix
+          upgrade-nix \
+          --extra-substituters https://cache.lix.systems --extra-trusted-public-keys "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o="
           nix --version
 
       - name: Sync repository
@@ -66,7 +69,7 @@ jobs:
         run: |
           # package=".#nixosConfigurations."${{ matrix.machine }}".config.system.build.toplevel"
           # nix build -L "$package"
-          nix run nixpkgs#nixos-rebuild build -- -L --flake ".#${{ matrix.machine }}"
+          nix run nixpkgs#nixos-rebuild build -- --flake ".#${{ matrix.machine }}"
 
       - name: cache
         # https://stackoverflow.com/a/58859404
@@ -74,7 +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&compression=none' \
+            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem' \
             -u https://nix-community.cachix.org \
             -u https://nixcache.web.cy7.sh \
             $package
@@ -117,14 +120,17 @@ jobs:
             accept-flake-config = true
             system-features = nixos-test benchmark big-parallel kvm
             secret-key-files = /home/runner/cache-priv-key.pem
-            extra-substituters = https://nixcache.cy7.sh https://cache.lix.systems
-            extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8= cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=
+            extra-substituters = https://nixcache.cy7.sh
+            extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8=
 
       - name: Install Lix
         run: |
           sudo --preserve-env=PATH $(which nix) run \
+          --experimental-features "nix-command flakes" \
+          --extra-substituters https://cache.lix.systems --extra-trusted-public-keys "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=" \
           'git+https://git.lix.systems/lix-project/lix?ref=refs/tags/2.92.0' -- \
-          upgrade-nix
+          upgrade-nix \
+          --extra-substituters https://cache.lix.systems --extra-trusted-public-keys "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o="
           nix --version
 
       - name: Sync repository
@@ -143,7 +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&compression=none' \
+            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem' \
             -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 c188482..11ebc32 100644
--- a/.github/workflows/build-packages.yml
+++ b/.github/workflows/build-packages.yml
@@ -40,14 +40,17 @@ jobs:
             accept-flake-config = true
             system-features = nixos-test benchmark big-parallel kvm
             secret-key-files = /home/runner/cache-priv-key.pem
-            extra-substituters = https://nixcache.cy7.sh https://cache.lix.systems
-            extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8= cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=
+            extra-substituters = https://nixcache.cy7.sh
+            extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8=
 
       - name: Install Lix
         run: |
           sudo --preserve-env=PATH $(which nix) run \
+          --experimental-features "nix-command flakes" \
+          --extra-substituters https://cache.lix.systems --extra-trusted-public-keys "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=" \
           'git+https://git.lix.systems/lix-project/lix?ref=refs/tags/2.92.0' -- \
-          upgrade-nix
+          upgrade-nix \
+          --extra-substituters https://cache.lix.systems --extra-trusted-public-keys "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o="
           nix --version
 
       - name: Sync repository
@@ -62,7 +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&compression=none' \
+            --to 's3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem' \
             -u https://nix-community.cachix.org \
             -u https://nixcache.web.cy7.sh \
             "${{ matrix.package }}"
diff --git a/flake.lock b/flake.lock
index 0fe0871..1a2c3f1 100644
--- a/flake.lock
+++ b/flake.lock
@@ -701,7 +701,9 @@
         "flake-utils": "flake-utils_3",
         "flakey-profile": "flakey-profile",
         "lix": "lix",
-        "nixpkgs": "nixpkgs_5"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1742943028,
@@ -972,22 +974,6 @@
       }
     },
     "nixpkgs_5": {
-      "locked": {
-        "lastModified": 1743448293,
-        "narHash": "sha256-bmEPmSjJakAp/JojZRrUvNcDX2R5/nuX6bm+seVaGhs=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "77b584d61ff80b4cef9245829a6f1dfad5afdfa3",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_6": {
       "locked": {
         "lastModified": 1743559129,
         "narHash": "sha256-7gpAWsENV3tY2HmeHYQ2MoQxGpys+jQWnkS/BHAMXVk=",
@@ -1056,7 +1042,7 @@
         "nil": "nil",
         "nix-index-database": "nix-index-database",
         "nix-ld": "nix-ld",
-        "nixpkgs": "nixpkgs_6",
+        "nixpkgs": "nixpkgs_5",
         "nixpkgs-stable": "nixpkgs-stable_3",
         "rust-overlay": "rust-overlay_4",
         "sops-nix": "sops-nix",
diff --git a/flake.nix b/flake.nix
index 37215e0..3bcf3e7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,6 +15,7 @@
     conduwuit.url = "github:girlbossceo/conduwuit";
     conduwuit.inputs.nixpkgs.follows = "nixpkgs";
     lix-module.url = "git+https://git.lix.systems/lix-project/nixos-module?ref=release-2.92";
+    lix-module.inputs.nixpkgs.follows = "nixpkgs";
     nix-ld.url = "github:nix-community/nix-ld";
     nix-ld.inputs.nixpkgs.follows = "nixpkgs";
     nil.url = "github:oxalica/nil";