Use deterministic path for repo checkout

build-obfs4proxy.py

@@ -7,8 +7,9 @@ from utils import get_build_versions, ex, get_sha256, fail, zip_files, get_final
     get_sources_file_name, get_pom_file_name, reset_time, get_obfs4_version, check_go_version, \
     get_version, GO_PATH, GO_ROOT, NDK_DIR
 
-REPO_DIR = './obfs4'
-GO_FLAGS = ['-asmflags', '-trimpath', '-o', '../obfs4proxy']
+REPO_DIR = '/tmp/obfs4'  # This needs to be always the same path, otherwise breaks reproducibility
+OUTPUT_FILE = os.path.abspath(os.path.join(os.path.curdir, 'obfs4proxy'))
+GO_FLAGS = ['-asmflags', '-trimpath', '-o', OUTPUT_FILE]
 
 
 def main():