Fix bash-ism in EUnit retry logicfix-bashism-in-eunit-retry

Bash has `let` but other shells might not have it.

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index ed22509e2..f5d15d47b 100644
--- a/Makefile
+++ b/Makefile
@@ -176,7 +176,7 @@ eunit: couch
                 if [ $$? -eq 0 ]; then \
                     break; \
                 else \
-                    let "tries=tries+1"; \
+                    tries=$$((tries+1)); \
                     [ $$tries -gt 2 ] && exit 1; \
                 fi \
             done \