diff --git a/docs/resource-sharing/os-backfill-containers.md b/docs/resource-sharing/os-backfill-containers.md
index 803750268..f5789ddbb 100644
--- a/docs/resource-sharing/os-backfill-containers.md
+++ b/docs/resource-sharing/os-backfill-containers.md
@@ -167,10 +167,12 @@ but the container will need fewer privileges.
 [cvmfsexec](https://github.com/CVMFS/cvmfsexec#readme) is a tool that can be used to mount CVMFS inside the container
 without requiring CVMFS on the host.
 To enable cvmfsexec, specify a space-separated list of repos in the `CVMFSEXEC_REPOS` environment variable.
-At a minimum, we recommend enabling the following repos:
-
--   `oasis.opensciencegrid.org`
--   `singularity.opensciencegrid.org`
+Adding the following line to `/etc/osg/ospool-ep.cfg` will enable the repos we recommend:
+```
+CVMFSEXEC_REPOS=oasis.opensciencegrid.org singularity.opensciencegrid.org
+```
+Note the absence of quotes around the definition. The startup scripts pass `/etc/osg/ospool-ep.cfg
+into the container utility, and thus its defintions are not subject to shell syntax.
 
 Additionally, you may set the following environment variables to further control the behavior of cvmfsexec: