diff --git a/spack-ext/repos/spack-stack/packages/upp-env/package.py b/spack-ext/repos/spack-stack/packages/upp-env/package.py
index eb051622d..e4fe72d09 100644
--- a/spack-ext/repos/spack-stack/packages/upp-env/package.py
+++ b/spack-ext/repos/spack-stack/packages/upp-env/package.py
@@ -24,9 +24,14 @@ class UppEnv(BundlePackage):
     depends_on("nemsio")
     depends_on("sfcio")
     depends_on("sigio")
+    depends_on("ip")
     depends_on("sp", when="^ip@:4")
     depends_on("w3nco")
     depends_on("w3emc")
     depends_on("wrf-io")
+    depends_on("prod-util")
+    # For testing:
+    depends_on("wgrib2")
+    depends_on("grib-util")
 
     # There is no need for install() since there is no code.