diff --git a/bob/devtools/build.py b/bob/devtools/build.py
index 17718c81f6ad2f2e1de43f034c144ad7f66cf1bd..11def1e4def56bbc698cc5919c27a88f94f337eb 100644
--- a/bob/devtools/build.py
+++ b/bob/devtools/build.py
@@ -615,7 +615,6 @@ if __name__ == '__main__':
 
   bootstrap.setup_logger(logger, args.verbose)
 
-  bootstrap.set_environment('PYTHONUNBUFFERED', '1')
   bootstrap.set_environment('DOCSERVER', server)
   bootstrap.set_environment('LANG', 'en_US.UTF-8')
   bootstrap.set_environment('LC_ALL', os.environ['LANG'])
diff --git a/bob/devtools/scripts/bdt.py b/bob/devtools/scripts/bdt.py
index 2ac4e0c611c2aa6ef6f74461d8334f35ae182aab..cb65ed19d2dd58016476d0c221897dd788d6b797 100644
--- a/bob/devtools/scripts/bdt.py
+++ b/bob/devtools/scripts/bdt.py
@@ -67,4 +67,3 @@ def main():
     # certificate setup: required for gitlab API interaction
     set_environment('SSL_CERT_FILE', CACERT, os.environ)
     set_environment('REQUESTS_CA_BUNDLE', CACERT, os.environ)
-    set_environment('PYTHONUNBUFFERED', '1', os.environ)