diff --git a/.gitignore b/.gitignore
index cad6198..148fcf2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ venv/
 *.egg-info/
 docs/_build/
 tzk/editions/
+dist/
diff --git a/requirements.txt b/requirements.txt
index 50d8e0e..ee817a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,7 @@ sphinx==3.5.4  # newer versions display function names in the wrong color?
 sphinx_rtd_theme==0.5.2
 
 # dev tools
+build
 setuptools
 twine
 wheel