diff --git a/default.nix b/default.nix
index a1782e91..9ac6e7c2 100644
--- a/default.nix
+++ b/default.nix
@@ -140,6 +140,7 @@ let
             xo-reflectutil    = self.callPackage pkgs/xo-reflectutil.nix    {};
             xo-arena          = self.callPackage pkgs/xo-arena.nix          { buildDocs = true; };
             xo-facet          = self.callPackage pkgs/xo-facet.nix          {};
+            xo-allocutil      = self.callPackage pkgs/xo-allocutil.nix      {};
             xo-refcnt         = self.callPackage pkgs/xo-refcnt.nix         {};
             xo-ordinaltree    = self.callPackage pkgs/xo-ordinaltree.nix    {};
             xo-flatstring     = self.callPackage pkgs/xo-flatstring.nix     { buildDocs = true; buildExamples = true; };
diff --git a/pkgs/xo-allocutil.nix b/pkgs/xo-allocutil.nix
new file mode 100644
index 00000000..acdceb1e
--- /dev/null
+++ b/pkgs/xo-allocutil.nix
@@ -0,0 +1,31 @@
+{
+  # nixpkgs dependencies
+  stdenv, cmake, catch2,
+
+  # xo dependencies
+  xo-cmake,
+#  xo-randomgen,
+#  xo-reflectutil,
+#  xo-indentlog,
+} :
+
+stdenv.mkDerivation (finalattrs:
+  {
+    name = "xo-allocutil";
+
+    src = ../xo-allocutil;
+
+    cmakeFlags = ["-DCMAKE_MODULE_PATH=${xo-cmake}/share/cmake"
+                  "-DENABLE_TESTING=1"
+                 ];
+    doCheck = true;
+    nativeBuildInputs = [
+      cmake catch2
+      xo-cmake
+#      xo-randomgen
+    ];
+    propagatedBuildInputs = [
+#      xo-reflectutil
+#      xo-indentlog
+    ];
+  })