diff --git a/flake.lock b/flake.lock
index f79f11b..46aeb0e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -34,17 +34,13 @@
     "openfoam": {
       "flake": false,
       "locked": {
-        "lastModified": 1672220166,
-        "narHash": "sha256-taqKAEPIG4jmiteMFF0wMYDYppsBf/a1k1kMEAahGl0=",
-        "ref": "refs/heads/master",
-        "rev": "0031cb1efac0d550334108346f26dde5e707b6fd",
-        "revCount": 26097,
-        "type": "git",
-        "url": "https://develop.openfoam.com/Development/openfoam"
+        "narHash": "sha256-2p/0PAltgFB9BkEGwc784WeAlpeheiyABYOe+beymDY=",
+        "type": "tarball",
+        "url": "https://develop.openfoam.com/Development/openfoam/-/archive/OpenFOAM-v2212/openfoam-OpenFOAM-v2212.tar.gz"
       },
       "original": {
-        "type": "git",
-        "url": "https://develop.openfoam.com/Development/openfoam"
+        "type": "tarball",
+        "url": "https://develop.openfoam.com/Development/openfoam/-/archive/OpenFOAM-v2212/openfoam-OpenFOAM-v2212.tar.gz"
       }
     },
     "root": {
diff --git a/flake.nix b/flake.nix
index f13d834..492c28e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,7 +6,7 @@
   inputs.nixpkgs.url = "github:bgamari/nixpkgs/wip/vtk-egg-info";
 
   inputs.openfoam = {
-    url = "git+https://develop.openfoam.com/Development/openfoam";
+    url = "https://develop.openfoam.com/Development/openfoam/-/archive/OpenFOAM-v2212/openfoam-OpenFOAM-v2212.tar.gz";
     flake = false;
   };