Fix load icon.

templates/common/build_icon.sh

@@ -34,7 +34,7 @@ if [ ! -z "$SPACK_BUILD_ICON" ]; then
   fi
 
   spack install $SPACK_BUILD_ICON
-  spack load $SPACK_BUILD_ICON
+  spack load "icon-nwp@${ICON_VERSION}%${COMPILER}"
 else
   echo "\%icon.spack_cmd\% is not defined. If you want to compile icon with spack, please provide a spack compile instruction string in your build.yml"
 fi