diff --git a/.github/workflows/build_test.sh b/.github/workflows/build_test.sh
index 2e1827073..70003d269 100755
--- a/.github/workflows/build_test.sh
+++ b/.github/workflows/build_test.sh
@@ -6,18 +6,7 @@ wget https://github.com/NeoGeographyToolkit/BinaryBuilder/releases/download/${ta
 /usr/bin/time tar xzf asp_deps.tar.gz -C / > /dev/null 2>&1 # this is verbose
 
 # The ASP dependencies at the location above are updated using the script
-# save_mac_deps.sh. See that script for how to do the preparations. 
-# Here is how the script is called, from a local machine (which need not be a Mac).
-# The tag set here must match the tag above, and also in build_isis.sh.
-# If changing here, must later change in the other places.
-# tag=mac_conda_env8 
-# workflow="ssh.yml" # manual workflow
-# #workflow="build_isis.yml" # automatic workflow
-# $HOME/projects/StereoPipeline/.github/workflows/save_mac_deps.sh $workflow $tag
-
-# For linux, the dependencies from the local machine can be saved as follows.
-# tag=linux_conda_env7
-# $HOME/projects/StereoPipeline/.github/workflows/save_linux_deps.sh $tag
+# save_mac_deps.sh. See that script for more info.
 
 # Check that base dir is StereoPipeline
 aspRepoDir=$(pwd) # same as $HOME/work/StereoPipeline/StereoPipeline
diff --git a/.github/workflows/save_mac_deps.sh b/.github/workflows/save_mac_deps.sh
index 97e656a84..468b76883 100755
--- a/.github/workflows/save_mac_deps.sh
+++ b/.github/workflows/save_mac_deps.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 
 # To update the Mac dependencies, or create new ones, run the ssh.yml action
-# (for interactive use) or build_isis.yml (batch). The dependencies can be
-# built, fetched with conda, etc. They should be installed in 
+# (for interactive use) or build_isis.yml (batch). Some dependencies can be
+# fetched with conda, and others need to be built. They should be installed in 
 # /Users/runner/miniconda3/envs. 
 # See https://stereopipeline.readthedocs.io/en/latest/building_asp.html
 # for more details.
@@ -12,10 +12,22 @@
 #   /usr/bin/time tar cfz ~/work/StereoPipeline/packages/asp_deps.tar.gz \
 #     /Users/runner/miniconda3/envs
 
-# Then, from a local machine, run this script. See build_test.sh for
-# context and an example. 
+# Then, from a local machine, which need not be a mac, run this script. 
 
-# Must keep $tag in sync.
+# The tag set here must match the tag in build_test.sh and build_isis.sh. If
+# changing here, must later change in the other places.
+
+# tag=mac_conda_env8 
+# workflow="ssh.yml" # manual workflow
+# #workflow="build_isis.yml" # automatic workflow
+# $HOME/projects/StereoPipeline/.github/workflows/save_mac_deps.sh $workflow $tag
+
+# This script will overwrite the dependencies. If in doubt, use it with a new
+# tag, as the dependencies are very hard to recreate.
+
+# For linux, the dependencies from the local machine can be saved as follows.
+# tag=linux_conda_env7
+# $HOME/projects/StereoPipeline/.github/workflows/save_linux_deps.sh $tag
 
 # Check usage
 if [ "$#" -lt 2 ]; then