diff --git a/flake.lock b/flake.lock
index 7e9f4d56b58..740c24cb022 100644
--- a/flake.lock
+++ b/flake.lock
@@ -119,7 +119,7 @@
     },
     "easy-purescript-nix": {
       "inputs": {
-        "flake-utils": "flake-utils"
+        "flake-utils": "flake-utils_2"
       },
       "locked": {
         "lastModified": 1710161569,
@@ -187,6 +187,24 @@
       "inputs": {
         "systems": "systems"
       },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
       "locked": {
         "lastModified": 1685518550,
         "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
@@ -201,9 +219,9 @@
         "type": "github"
       }
     },
-    "flake-utils_2": {
+    "flake-utils_3": {
       "inputs": {
-        "systems": "systems_2"
+        "systems": "systems_3"
       },
       "locked": {
         "lastModified": 1731533236,
@@ -219,9 +237,9 @@
         "type": "github"
       }
     },
-    "flake-utils_3": {
+    "flake-utils_4": {
       "inputs": {
-        "systems": "systems_3"
+        "systems": "systems_4"
       },
       "locked": {
         "lastModified": 1710146030,
@@ -563,7 +581,7 @@
         ],
         "easy-purescript-nix": "easy-purescript-nix",
         "flake-compat": "flake-compat_2",
-        "flake-utils": "flake-utils_2",
+        "flake-utils": "flake-utils_3",
         "hackage": [
           "hackage"
         ],
@@ -673,7 +691,7 @@
     },
     "nix2container": {
       "inputs": {
-        "flake-utils": "flake-utils_3",
+        "flake-utils": "flake-utils_4",
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
@@ -970,6 +988,7 @@
     "root": {
       "inputs": {
         "CHaP": "CHaP",
+        "flake-utils": "flake-utils",
         "hackage": "hackage",
         "haskell-nix": "haskell-nix",
         "iogx": "iogx",
@@ -1093,6 +1112,21 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "systems_4": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 858647c425c..1438d62c199 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,6 +28,8 @@
       url = "github:input-output-hk/haskell.nix";
       inputs.hackage.follows = "hackage";
     };
+
+    flake-utils.url = "github:numtide/flake-utils";
   };
 
   outputs = inputs:
@@ -39,9 +41,11 @@
     };
 
   nixConfig = {
-    extra-substituters = [ "https://cache.iog.io" ];
-    extra-trusted-public-keys =
-      [ "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" ];
+    extra-substituters = [ "https://cache.iog.io" "https://cache.garnix.io" ];
+    extra-trusted-public-keys = [
+      "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
+      "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
+    ];
     allow-import-from-derivation = true;
   };
 }
diff --git a/garnix.yaml b/garnix.yaml
new file mode 100644
index 00000000000..c36133d5b4e
--- /dev/null
+++ b/garnix.yaml
@@ -0,0 +1,5 @@
+builds:
+  # TODO once we have fully migrated from hydra to garnix, refactor nix/output.nix 
+  # by removing all references to hydraJobs and populating this `include` section.
+  include:
+  - 'checks.*.*'
\ No newline at end of file
diff --git a/nix/outputs.nix b/nix/outputs.nix
index 702b64289a2..a1baf828106 100644
--- a/nix/outputs.nix
+++ b/nix/outputs.nix
@@ -11,9 +11,11 @@ let
   ghc810 = project.variants.ghc810;
   ghc910 = project.variants.ghc910;
 
-in [
+in
+[
   {
     inherit (project) cabalProject;
+    inherit project repoRoot;
 
     devShells.default = ghc96.devShell;
     devShells.profiled = ghc96-profiled.devShell;
@@ -24,7 +26,7 @@ in [
 
     packages = ghc96.packages;
     apps = ghc96.apps;
-    checks = ghc96.checks;
+    # checks = ghc96.checks;
 
     latex-documents = repoRoot.nix.latex-documents;
 
@@ -37,7 +39,7 @@ in [
   }
 
   (lib.optionalAttrs (system == "x86_64-linux" || system == "x86_64-darwin") {
-    hydraJobs.plutus-metatheory-site = repoRoot.nix.plutus-metatheory-site;
+    packages.plutus-metatheory-site = repoRoot.nix.plutus-metatheory-site;
 
     hydraJobs.ghc96 = ghc96.hydraJobs;
     hydraJobs.ghc810 = ghc810.hydraJobs;
@@ -63,7 +65,7 @@ in [
 
   (lib.optionalAttrs (system == "aarch64-darwin") {
     # Plausibly if things build on x86 darwin then they'll build on aarch darwin.
-    # Se we only build roots and dev sshells on aarch to avoid overloading the builders.
+    # Se we only build roots and dev shells on aarch to avoid overloading the builders.
     hydraJobs.ghc810.devShell = ghc810.devShell;
     hydraJobs.ghc96.devShell = ghc96.devShell;
     hydraJobs.ghc98.devShell = ghc98.devShell;
@@ -81,4 +83,8 @@ in [
     hydraJobs.ghc910.roots = ghc910.hydraJobs.roots;
     hydraJobs.ghc910.plan-nix = ghc910.hydraJobs.plan-nix;
   })
+  {
+    checks = repoRoot.nix.utils.flattenDerivationTree "ci" "-"
+      inputs.self.hydraJobs.${system};
+  }
 ]
diff --git a/nix/utils.nix b/nix/utils.nix
new file mode 100644
index 00000000000..e0fd1cf332c
--- /dev/null
+++ b/nix/utils.nix
@@ -0,0 +1,15 @@
+{ repoRoot, inputs, pkgs, system, lib }: {
+
+  flattenDerivationTree = prefix: separator: set:
+    let
+      recurse = name: name':
+        flatten (if name == "" then name' else "${name}${separator}${name'}");
+
+      flatten = name: value:
+        if lib.isDerivation value || lib.typeOf value != "set" then [{
+          inherit name value;
+        }] else
+          lib.concatLists (lib.mapAttrsToList (recurse name) value);
+
+    in assert lib.typeOf set == "set"; lib.listToAttrs (flatten prefix set);
+}