diff --git a/MPI/gromacs/2016/variants b/MPI/gromacs/2016/variants
new file mode 100644
index 0000000..7b9fec9
--- /dev/null
+++ b/MPI/gromacs/2016/variants
@@ -0,0 +1 @@
+gromacs/2016.4	unstable	gcc/5.4.0 openmpi/1.10.4 b:cmake/3.6.3
diff --git a/MPI/gromacs/4/variants b/MPI/gromacs/4/variants
new file mode 100644
index 0000000..6316eb9
--- /dev/null
+++ b/MPI/gromacs/4/variants
@@ -0,0 +1 @@
+gromacs/4.6.7        unstable	gcc/4.8.4 openmpi/1.8.4
diff --git a/MPI/gromacs/5/variants b/MPI/gromacs/5/variants
new file mode 100644
index 0000000..6c972ea
--- /dev/null
+++ b/MPI/gromacs/5/variants
@@ -0,0 +1,3 @@
+gromacs/5.0.4	unstable	gcc/4.8.4 openmpi/1.8.4
+gromacs/5.0.5	unstable	gcc/4.9.2 openmpi/1.8.4
+gromacs/5.1.2	unstable	gcc/4.9.3 openmpi/1.10.0
diff --git a/MPI/gromacs/build b/MPI/gromacs/build
index d97f124..78bfb81 100755
--- a/MPI/gromacs/build
+++ b/MPI/gromacs/build
@@ -1,20 +1,20 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="http://ftp.gromacs.org/pub/$P/$P-$V.tar.gz"
+
 pbuild::configure() {
 	cmake \
 		-DCMAKE_INSTALL_PREFIX="${PREFIX}" \
 		-DCMAKE_BUILD_TYPE=RELEASE \
 		-DGMX_MPI=on \
 		-DGMX_GPU=off \
+		-DGMX_SIMD=SSE2 \
 		-DGMX_BUILD_OWN_FFTW=on \
 		"${MODULE_SRCDIR}" \
 		|| exit 1
 }
 
-
 pbuild::add_to_group 'MPI'
-pbuild::set_runtime_dependencies "${COMPILER}" "${MPI}"
-pbuild::set_build_dependencies "${COMPILER}" "${MPI}" cmake
 pbuild::set_docfiles \
 		AUTHORS \
 		COPYING \