diff --git a/lib/extended.nix b/lib/extended.nix
index 4a1e4da..2c031d1 100644
--- a/lib/extended.nix
+++ b/lib/extended.nix
@@ -63,6 +63,11 @@ let
       (substring 6 2 longDate)
     ]);
 
+  flakeVer =
+    flake:
+      "${flake.shortRev or flake.dirtyShortRev}-${mkDate (toString flake.lastModifiedDate)}";
+
+
   isNixFile = p: hasSuffix ".nix" p;
   isDefaultNixFile = p: hasSuffix "default.nix" p;
   filterNotDefaultNixFile = paths: filter (p: !(isDefaultNixFile p) && (isNixFile p)) paths;
@@ -81,5 +86,6 @@ in
     mkIfIn
     isNixFile
     listNixFilesRecursive
+    flakeVer
     ;
 }
diff --git a/modules/languages/roc.nix b/modules/languages/roc.nix
index b0a3b09..d298920 100644
--- a/modules/languages/roc.nix
+++ b/modules/languages/roc.nix
@@ -6,14 +6,23 @@
   ...
 }:
 let
-  inherit (lib) mkIfIn;
+  inherit (lib) mkIfIn flakeVer;
+
+  version = flakeVer inputs.roc;
   cfg = config.oizys.languages;
   rocPkgs = inputs.roc.packages.${pkgs.system};
+  # I'm setting the versions so the changes are more apparent as flake is updated
+  roc = rocPkgs.cli.overrideAttrs {
+    inherit version;
+
+  };
+  lang-server = rocPkgs.lang-server.overrideAttrs {
+    inherit version;
+  };
+
 in
 {
   config = mkIfIn "roc" cfg {
-    environment.systemPackages = with rocPkgs; [
-      full # cli + lang_server
-    ];
+    environment.systemPackages = [roc lang-server];
   };
 }