diff --git a/pkgs/development/python-modules/units-llnl/default.nix b/pkgs/development/python-modules/units-llnl/default.nix
new file mode 100644
index 000000000000..03d0cfda1515
--- /dev/null
+++ b/pkgs/development/python-modules/units-llnl/default.nix
@@ -0,0 +1,56 @@
+{
+  lib,
+  buildPythonPackage,
+  units-llnl,
+
+  # build-system
+  nanobind,
+  scikit-build-core,
+
+  # nativeBuildInputs
+  cmake,
+  # NOTE that if top-level units-llnl package uses cmakeFlags other then
+  # Nixpkgs' default, the build might fail, and you'd want to pick only the
+  # cmakeFlags that don't cause a failure. See also:
+  # https://github.com/scipp/scipp/issues/3705
+  cmakeFlags ? units-llnl.cmakeFlags,
+  ninja,
+}:
+
+buildPythonPackage {
+  inherit (units-llnl)
+    pname
+    version
+    src
+    meta
+    ;
+  pyproject = true;
+
+  build-system = [
+    nanobind
+    scikit-build-core
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+  ];
+  dontUseCmakeConfigure = true;
+  env = {
+    SKBUILD_CMAKE_ARGS = lib.strings.concatStringsSep ";" (
+      cmakeFlags
+      ++ [
+        (lib.cmakeBool "UNITS_BUILD_PYTHON_LIBRARY" true)
+      ]
+    );
+  };
+
+  # Also upstream turns off testing for the python build so it seems, see:
+  # https://github.com/LLNL/units/blob/v0.13.1/pyproject.toml#L65-L66 However
+  # they do seem to use pytest for their CI, but in our case it fails due to
+  # missing googletest Python modules, which we don't know how to build.
+  doCheck = false;
+  passthru = {
+    top-level = units-llnl;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 35539f3ee485..5d4d3954d3c8 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -18748,6 +18748,10 @@ self: super: with self; {
 
   unique-log-filter = callPackage ../development/python-modules/unique-log-filter { };
 
+  units-llnl = callPackage ../development/python-modules/units-llnl {
+    inherit (pkgs) units-llnl;
+  };
+
   unittest-data-provider = callPackage ../development/python-modules/unittest-data-provider { };
 
   unittest-xml-reporting = callPackage ../development/python-modules/unittest-xml-reporting { };