diff --git a/pkgs/tools/networking/opensm/default.nix b/pkgs/tools/networking/opensm/default.nix
new file mode 100644
index 000000000000..a053c82a8264
--- /dev/null
+++ b/pkgs/tools/networking/opensm/default.nix
@@ -0,0 +1,26 @@
+{ stdenv, fetchgit, autoconf, automake, libtool, bison, flex, rdma-core }:
+
+stdenv.mkDerivation rec {
+  name = "opensm-${version}";
+  version = "3.3.20";
+
+  src = fetchgit {
+    url = git://git.openfabrics.org/~halr/opensm.git;
+    rev = name;
+    sha256 = "1hlrn5z32yd4w8bj4z6bsfv84pk178s4rnppbabyjqv1rg3c58wl";
+  };
+
+  nativeBuildInputs = [ autoconf automake libtool bison flex ];
+
+  buildInputs = [ rdma-core ];
+
+  preConfigure = "bash ./autogen.sh";
+
+  meta = with stdenv.lib; {
+    description = "Infiniband subnet manager";
+    homepage = https://www.openfabrics.org/;
+    license = licenses.gpl2; # dual licensed as 2-clause BSD
+    maintainers = [ maintainers.aij ];
+    platforms = [ "x86_64-linux" ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 140da3dd2f2b..cc6190082d0e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3960,6 +3960,8 @@ with pkgs;
     inherit (darwin.apple_sdk.frameworks) Carbon;
   };
 
+  opensm = callPackage ../tools/networking/opensm { };
+
   openssh =
     callPackage ../tools/networking/openssh {
       hpnSupport = false;