Use lower case when specifying compilers

build.bash

@@ -65,18 +65,20 @@ while [ $# -gt 0 ]; do
 done
 
 if hostname -f | grep gadi.nci.org.au > /dev/null; then
-    : "${compiler:=Intel}"
+    : "${compiler:=intel}"
 
     . /etc/bashrc
     module purge
     module add cmake/3.24.2
     module add netcdf/4.6.3
     case ${compiler} in
-        Intel)
+        intel)
             module add intel-compiler/2019.5.281
+            compiler_lib_install_dir=Intel
             ;;
-        GNU)
+        gnu)
             module add gcc/13.2.0
+            compiler_lib_install_dir=GNU
             ;;
         ?*)
             echo -e "\nError: compiler ${compiler} is not supported.\n"
@@ -85,7 +87,7 @@ if hostname -f | grep gadi.nci.org.au > /dev/null; then
 
     # This is required so that the netcdf-fortran library is discoverable by
     # pkg-config:
-    prepend_path PKG_CONFIG_PATH "${NETCDF_BASE}/lib/${compiler}/pkgconfig"
+    prepend_path PKG_CONFIG_PATH "${NETCDF_BASE}/lib/${compiler_lib_install_dir}/pkgconfig"
 
     if [[ -n $mpi ]]; then
         module add intel-mpi/2019.5.281
@@ -94,7 +96,7 @@ if hostname -f | grep gadi.nci.org.au > /dev/null; then
     if module is-loaded openmpi; then
         # This is required so that the openmpi MPI libraries are discoverable
         # via CMake's `find_package` mechanism:
-        prepend_path CMAKE_PREFIX_PATH "${OPENMPI_BASE}/include/${compiler}"
+        prepend_path CMAKE_PREFIX_PATH "${OPENMPI_BASE}/include/${compiler_lib_install_dir}"
     fi
 fi