diff --git a/flake.lock b/flake.lock
index 40ed931..ec9dac9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1726560853,
-        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -69,11 +69,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1730272153,
-        "narHash": "sha256-B5WRZYsRlJgwVHIV6DvidFN7VX7Fg9uuwkRW9Ha8z+w=",
+        "lastModified": 1734435836,
+        "narHash": "sha256-kMBQ5PRiFLagltK0sH+08aiNt3zGERC2297iB6vrvlU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2d2a9ddbe3f2c00747398f3dc9b05f7f2ebb0f53",
+        "rev": "4989a246d7a390a859852baddb1013f825435cee",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 7ad58ea..bec07e6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -98,7 +98,7 @@
             [
               vulkan-tools
               llvmPackages_19.clang-tools
-              llvmPackages_17.libllvm
+              llvmPackages_19.libllvm
               sccache
 
               just
diff --git a/wren_utils/include/wren/utils/result.hpp b/wren_utils/include/wren/utils/result.hpp
index 3822640..3445495 100644
--- a/wren_utils/include/wren/utils/result.hpp
+++ b/wren_utils/include/wren/utils/result.hpp
@@ -18,6 +18,7 @@ namespace wren {
 class Err {
  public:
   template <typename T>
+    requires std::is_error_code_enum_v<T>
   Err(T error) : error_code_(make_error_code(error)) {}
   Err(const std::error_code& ec) : error_code_(ec) {}
   Err(int32_t ec, const std::error_category& e_cat) : error_code_(ec, e_cat) {}