diff --git a/doc/release-process.md b/doc/release-process.md
--- a/doc/release-process.md
+++ b/doc/release-process.md
@@ -26,7 +26,8 @@
     - Testnet should be set some tens of thousands back from the tip due to reorgs there.
     - This update should be reviewed with a reindex-chainstate with assumevalid=0 to catch any defect
       that causes rejection of blocks in the past history.
-    - Regenerate manpages (run contrib/devtools/gen-manpages.sh).
+    - Regenerate manpages (run `contrib/devtools/gen-manpages.sh`, or for out-of-tree builds run
+      `BUILDDIR=$PWD/build contrib/devtools/gen-manpages.sh`).
     - Update seeds as per [contrib/seeds/README.md](contrib/seeds/README.md)
 
 4. Add git tag for release