diff --git a/projects/apple-unix/genericio.cmake b/projects/apple-unix/genericio.cmake
index 51e48ff36529ba37fe48069bc63ffeb84ff54512..fd5d280c908b3b5be692b219a55d3cde3ae7251a 100644
--- a/projects/apple-unix/genericio.cmake
+++ b/projects/apple-unix/genericio.cmake
@@ -2,6 +2,9 @@ superbuild_add_project(genericio
   DEPENDS mpi
   DEPENDS_OPTIONAL cxx11
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DBUILD_SHARED_LIBS:BOOL=OFF
     -DBUILD_TESTING:BOOL=OFF
     -DBUILD_PROGRAMS:BOOL=OFF)
diff --git a/projects/embree.cmake b/projects/embree.cmake
index 897ab2f2fd25e7c676bd025f4237f8edc418e8ad..90a6af528e07c74b7043dfb000570e21589fcfb3 100644
--- a/projects/embree.cmake
+++ b/projects/embree.cmake
@@ -20,6 +20,9 @@ superbuild_add_project(embree
   CMAKE_ARGS
     ${embree_isa_args}
     ${embree_allow_skx}
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DBUILD_TESTING:BOOL=OFF
     -DEMBREE_ISPC_EXECUTABLE:PATH=<INSTALL_DIR>/bin/ispc
     -DEMBREE_GEOMETRY_HAIR:BOOL=ON
diff --git a/projects/las.cmake b/projects/las.cmake
index de7c3d2e9dc6287c4b21a6d139de665d0ba7f18c..d25b5f913ab1a3ab2e9bacbca5b3e897db509bc7 100644
--- a/projects/las.cmake
+++ b/projects/las.cmake
@@ -1,6 +1,9 @@
 superbuild_add_project(las
   DEPENDS boost
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DWITH_GDAL:BOOL=FALSE
     -DBUILD_OSGEO4W:BOOL=OFF
     -DWITH_GEOTIFF:BOOL=FALSE
diff --git a/projects/ospray.cmake b/projects/ospray.cmake
index c09ea0eceefcd3c42a71f873acbd952a5bf91fe6..96005ce77cfebe38e9d99b813abb4017f0872424 100644
--- a/projects/ospray.cmake
+++ b/projects/ospray.cmake
@@ -12,6 +12,9 @@ set_property(CACHE ospray_BUILD_ISA PROPERTY STRINGS SSE AVX AVX2 AVX512KNL AVX5
 superbuild_add_project(ospray
   DEPENDS ispc tbb cxx11 embree ospraymaterials
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DTBB_ROOT:PATH=<INSTALL_DIR>
     -DOSPRAY_ISPC_DIRECTORY:PATH=<INSTALL_DIR>/bin
     -DOSPRAY_BUILD_ISA:STRING=${ospray_BUILD_ISA}
diff --git a/projects/paraview.cmake b/projects/paraview.cmake
index 5fbb134e1f92746e915ae62afa4fd500d1f179dc..2c07a7d877a700a364ae27f058919deac8da90a1 100644
--- a/projects/paraview.cmake
+++ b/projects/paraview.cmake
@@ -148,6 +148,9 @@ superbuild_add_project(paraview
     ${PARAVIEW_EXTERNAL_PROJECTS}
 
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
     -DBUILD_TESTING:BOOL=OFF
     -DPARAVIEW_BUILD_PLUGIN_CoProcessingScriptGenerator:BOOL=ON
diff --git a/projects/paraview.plugin.cmake b/projects/paraview.plugin.cmake
index bb0a09d3c9205bd03862d2dbdef120e06564a563..d64cf5805d1050548f583592b9d694ec2f86a5bc 100644
--- a/projects/paraview.plugin.cmake
+++ b/projects/paraview.plugin.cmake
@@ -41,6 +41,9 @@ superbuild_add_project("${plugin_project}"
 
   INSTALL_COMMAND
     "${CMAKE_COMMAND}"
+      -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+      -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+      -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
       -Dparaview_binary_location:PATH=${paraview_binary_dir}
       -Dplugin_name:STRING=${${plugin_project}_name}
       -Dbundle_name:STRING=${CMAKE_BINARY_DIR}/${${plugin_project}_name}
diff --git a/projects/unix/boxlib.cmake b/projects/unix/boxlib.cmake
index c6c7ef248d9a41ce79bf20d3563d317e88974087..e69aa481cd4024af88ac38f34659d468e014de53 100644
--- a/projects/unix/boxlib.cmake
+++ b/projects/unix/boxlib.cmake
@@ -7,6 +7,9 @@ superbuild_add_project(boxlib
   DEPENDS fortran
   DEPENDS_OPTIONAL mpi
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DBL_SPACEDIM:STRING=3
     -DENABLE_POSITION_INDEPENDENT_CODE:BOOL=TRUE
     -DENABLE_MPI:BOOL=${boxlib_mpi_flag})
diff --git a/projects/unix/llvm.cmake b/projects/unix/llvm.cmake
index 28447660794859fb87592b43e0e52f8a7bfcbf40..4a62290685eb0d892886f6da49f62a7d4f451c8b 100644
--- a/projects/unix/llvm.cmake
+++ b/projects/unix/llvm.cmake
@@ -11,6 +11,9 @@ superbuild_add_project(llvm
   CAN_USE_SYSTEM
   DEPENDS python cxx11
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DCMAKE_BUILD_TYPE=Release
     -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
     -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
diff --git a/projects/vrpn.cmake b/projects/vrpn.cmake
index db898f15deee5c63a862054f92365a4470eee625..e371c2f3ca823a293bc0089daab7cc396ef0169e 100644
--- a/projects/vrpn.cmake
+++ b/projects/vrpn.cmake
@@ -1,3 +1,6 @@
 superbuild_add_project(vrpn
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS})
diff --git a/projects/win32/openvr.cmake b/projects/win32/openvr.cmake
index 0d5a35077eae0c52db6dc04e9845bc93d569ac27..64863446b30a235f53e7b4135b49b4039d8933b9 100644
--- a/projects/win32/openvr.cmake
+++ b/projects/win32/openvr.cmake
@@ -1,6 +1,9 @@
 
 superbuild_add_project(openvr
   CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_FORTRAN_COMPILER=${CMAKE_FORTRAN_COMPILER}
     -DCMAKE_INSTALL_LIBDIR:STRING=lib
     )