diff --git a/default.nix b/default.nix
index e28699f..a6c0169 100644
--- a/default.nix
+++ b/default.nix
@@ -12,6 +12,8 @@ rec {
 
     netbox-topology-views = callPythonPackage ./python-modules/netbox-topology-views { };
 
+    nmslib = callPythonPackage ./python-modules/nmslib { };
+
     prefixed = callPythonPackage ./python-modules/prefixed { };
   }));
 
diff --git a/python-modules/nmslib/default.nix b/python-modules/nmslib/default.nix
new file mode 100644
index 0000000..cd61204
--- /dev/null
+++ b/python-modules/nmslib/default.nix
@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fetchpatch
+, numpy
+, psutil
+, pybind11
+}:
+
+buildPythonPackage rec {
+  pname = "nmslib";
+  version = "2.1.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-lxKUp3ZvkcaX1jyIyK3aR5epRDRsxTWiFzk/QWehnCA=";
+  };
+
+  patchFlags = [ "-p2" ];
+  patches = [
+    # Fix import on newer versions of pybind11 (https://github.com/nmslib/nmslib/pull/488)
+    (fetchpatch {
+      url = "https://github.com/nmslib/nmslib/commit/574ecd54c157d13aecc03033311be261c91a45ec.patch";
+      sha256 = "sha256-R/y6BbnZRe7VM5XCbes6Z5A5N66r+8SCA2Hy6K301IM=";
+    })
+  ];
+
+  propagatedBuildInputs = [
+    numpy
+    psutil
+    pybind11
+  ];
+
+  meta = with lib; {
+    description = "An efficient similarity search library and a toolkit for evaluation of their methods";
+    homepage = "https://github.com/nmslib/nmslib";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ sbruder ];
+    platforms = platforms.all;
+  };
+}