$dub build --force-remove
Building vibe-d configuration "libevent", build type debug.
Running dmd...
FAIL /.dub/packages/vibe-d-0.7.21-alpha.1/.dub/build/libevent-debug-linux.posix-x86_64-dmd-AB0707232CA963B5DA23C2232BBED51B vibe-d staticLibrary
Error executing command build: DMD compile run failed with exit code -9