[#2161] comment in Makefile.am

diff --git a/doc/sphinx/Makefile.am b/doc/sphinx/Makefile.am
index 513d2d03f17b0a71fd76bfc9657730b931fb16f5..7fa957bdcd64d2a9a3a97ff9c7440a15f607f840 100644 (file)
--- a/doc/sphinx/Makefile.am
+++ b/doc/sphinx/Makefile.am
@@ -179,6 +179,10 @@ $(man8s): mans
 mans: $(man_sources) api-files.txt mes-files.txt
        $(SPHINXBUILD) -M man $(srcdir) $(sphinxbuilddir) $(sphinxopts)
 
+# Updates sphinx dependencies to the latest versions available on the current
+# host and freezes them in ./src/requirements.txt. Requires pip-compile:
+#   pip install pip-tools
+# Run this when dependencies are added, changed or removed.
 update-python-dependencies: ./src/requirements.in
        pip-compile -r ./src/requirements.in