diff --git a/.travis.yml b/.travis.yml
index 234e62b4..7b468ad7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -56,6 +56,6 @@ addons:
       version: 0.1
       description: "Build submitted via Travis CI"
     notification_email: leo@yuriev.ru
-    build_command_prepend: "make clean && git fetch --unshallow --tags --prune && make dist"
-    build_command: "make -C dist all"
+    build_command_prepend: "git fetch --unshallow --tags --prune && make dist"
+    build_command: "make MDBX_OPTIONS=-DMDBX_DEBUG=2 -C dist all"
     branch_pattern: coverity_scan