adds testApplication

pkgs/default.nix

@@ -147,14 +147,20 @@ let
     test = pkgs.stdenv.mkDerivation rec {
       name = "testEnv";
 
-      buildInputs = testBuildInputs ++ [
-        lammps
-        qmcpack
-        openmc
-        stream
-        amg
-        #data
-        openmc-data
+      buildInputs = [
+        # argotk runs mpiexec:
+        pkgs.mpich2
+        # argotk uses hwloc to choose CPU counts:
+        pkgs.hwloc
+        # these are needed for some reason:
+        pkgs.coreutils
+        pkgs.utillinux
+        pkgs.git
+        # argo tools
+        argotk
+        # argo components
+        containers
+        nrm
       ];
 
       #required to be able to build the drv.
@@ -176,6 +182,16 @@ let
       OPENMC_CROSS_SECTIONS = "${openmc-data}/cross_sections.xml";
       OPENMC_PWD = "${argotk}/share/openmc";
     };
+    testApplications = test.overrideAttrs (old:{
+      buildInputs = testBuildInputs ++ [
+        lammps
+        qmcpack
+        openmc
+        stream
+        amg
+        openmc-data
+      ];
+    });
 
     expe = test.overrideAttrs (old:{
       buildInputs = testBuildInputs ++ [