diff --git a/pkgs/applications/science/electronics/openems/default.nix b/pkgs/applications/science/electronics/openems/default.nix
new file mode 100644
index 00000000000..f7c8dd7467a
--- /dev/null
+++ b/pkgs/applications/science/electronics/openems/default.nix
@@ -0,0 +1,76 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, csxcad
+, fparser
+, tinyxml
+, hdf5
+, vtk
+, boost
+, zlib
+, cmake
+, octave
+, gl2ps
+, withQcsxcad ? true
+, withMPI ? false
+, withHyp2mat ? true
+, qcsxcad ? null
+, openmpi ? null
+, hyp2mat ? null
+}:
+
+assert withQcsxcad -> qcsxcad != null;
+assert withMPI -> openmpi != null;
+assert withHyp2mat -> hyp2mat != null;
+
+stdenv.mkDerivation {
+  pname = "openems";
+  version = "unstable-2020-02-15";
+
+  src = fetchFromGitHub {
+    owner = "thliebig";
+    repo = "openEMS";
+    rev = "ba793ac84e2f78f254d6d690bb5a4c626326bbfd";
+    sha256 = "1dca6b6ccy771irxzsj075zvpa3dlzv4mjb8xyg9d889dqlgyl45";
+  };
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  cmakeFlags = lib.optionals withMPI [ "-DWITH_MPI=ON" ];
+
+  buildInputs = [
+    fparser
+    tinyxml
+    hdf5
+    vtk
+    boost
+    zlib
+    csxcad
+    (octave.override { inherit hdf5; }) ]
+    ++ lib.optionals withQcsxcad [ qcsxcad ]
+    ++ lib.optionals withMPI [ openmpi ]
+    ++ lib.optionals withHyp2mat [ hyp2mat ];
+
+  postFixup = ''
+    substituteInPlace $out/share/openEMS/matlab/setup.m \
+      --replace /usr/lib ${hdf5}/lib \
+      --replace /usr/include ${hdf5}/include
+
+    ${octave}/bin/mkoctfile -L${hdf5}/lib -I${hdf5}/include \
+      -lhdf5 $out/share/openEMS/matlab/h5readatt_octave.cc \
+      -o $out/share/openEMS/matlab/h5readatt_octave.oct
+  '';
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "Open Source Electromagnetic Field Solver";
+    homepage = "http://openems.de/index.php/Main_Page.html";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ matthuszagh ];
+    platforms = platforms.linux;
+    badPlatforms = platforms.aarch64;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5d4f035ae02..000ba87fdba 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -26531,6 +26531,8 @@ in
 
   ngspice = callPackage ../applications/science/electronics/ngspice { };
 
+  openems = callPackage ../applications/science/electronics/openems { };
+
   pcb = callPackage ../applications/science/electronics/pcb { };
 
   qcsxcad = libsForQt514.callPackage ../applications/science/electronics/qcsxcad { };