diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fbcd6a1..4b50f821 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -505,8 +505,7 @@ if (FMT_MASTER_PROJECT AND EXISTS ${gitignore})
     string(REPLACE "*" ".*" line "${line}")
     set(ignored_files ${ignored_files} "${line}$" "${line}/")
   endforeach ()
-  set(ignored_files ${ignored_files}
-    /.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees)
+  set(ignored_files ${ignored_files} /.git /build)
 
   set(CPACK_SOURCE_GENERATOR ZIP)
   set(CPACK_SOURCE_IGNORE_FILES ${ignored_files})
diff --git a/support/manage.py b/support/manage.py
index 8cc8651c..ae5252fc 100755
--- a/support/manage.py
+++ b/support/manage.py
@@ -176,7 +176,6 @@ def release(args):
     run = Runner(fmt_repo.dir)
     run('cmake', '.')
     run('make', 'doc', 'package_source')
-    shutil.rmtree('build')
 
     # Create a release on GitHub.
     fmt_repo.push('origin', 'release')