diff --git a/build/macos/1_build-deps-macports.sh b/build/macos/1_build-deps-macports.sh
index 115cfe70df..f06193588b 100644
--- a/build/macos/1_build-deps-macports.sh
+++ b/build/macos/1_build-deps-macports.sh
@@ -43,7 +43,9 @@ if [ -f "$OPT_PREFIX/bin/port" ]; then
   elif echo "$CI_JOB_NAME" | grep -q 'deps'; then
     export first_cache=true
   fi
-  eval $( [ "$OPT_PREFIX" = /opt/local ] && echo sudo ) port sync -Nv
+  if echo "$CI_JOB_NAME" | grep -q 'deps' && { [ "$CI_COMMIT_BRANCH" = "$CI_DEFAULT_BRANCH" ] || [ "$first_cache" ] }; then
+    eval $( [ "$OPT_PREFIX" = /opt/local ] && echo sudo ) port sync -Nv
+  fi
   eval $( [ "$OPT_PREFIX" = /opt/local ] && echo sudo ) port install -N $(grep -v '^#' build/macos/all-deps-uni.txt | sed 's/|homebrew:[^ ]*//g' | tr -d '\' | xargs)
   if echo "$CI_JOB_NAME" | grep -q 'deps' && { [ "$CI_COMMIT_BRANCH" = "$CI_DEFAULT_BRANCH" ] || [ "$first_cache" ] }; then
     mkdir -p macports-cached-$(uname -m) && cp -fa $OPT_PREFIX/var/macports/* macports-cached-$(uname -m) || true