bin/build-packages: compress with -19 if --ultra -20 fails

1 files changed, 5 insertions, 1 deletions

diff --git a/bin/build-packages b/bin/build-packages
index 639e6e5..75cdbba 100755
--- a/bin/build-packages
+++ b/bin/build-packages
@@ -679,8 +679,12 @@ while [ "${count}" -ne 0 ] && \
           # machine, if need arises in the future). Note, that it is no
           # error, if the above build command already produced a
           # compressed package.
+          # Since --ultra -20 seems too much for our i486 build vms, we
+          # silently fall back to -19 (without --ultra) if the higher
+          # level fails.
           find . -maxdepth 1 -type f -name '*.pkg.tar' \
-            -execdir zstd --rm -T0 --ultra -20 '{}' -o '{}.zst' \;
+            -not -execdir zstd --rm -T0 --ultra -20 '{}' -o '{}.zst' \; \
+            -execdir zstd --rm -T0 -19 '{}' -o '{}.zst' \;
           # package files, that still exist, threw an error upon compression
           errors=$(
             find . -maxdepth 1 -type f -name '*.pkg.tar'