diff --git a/build.sh b/build.sh
index 5bc0190..653e5fa 100755
--- a/build.sh
+++ b/build.sh
@@ -16,6 +16,7 @@ OPENMPI_VERSION=4.1.4
 
 
 # CMakeLists.txt requires ESMF v8.3.0 or higher, FMS, and ParallelIO, but NCI doesn't supply them, so we use our own installation via spack.
+# This is in /g/data/ik11/spack/ which uses https://github.com/COSIMA/spack-config
 
 module purge
 module load cmake/3.24.2