diff --git a/python-dulwich.changes b/python-dulwich.changes
index 5c779b3..85d2578 100644
--- a/python-dulwich.changes
+++ b/python-dulwich.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Sep 17 19:51:41 UTC 2017 - bwiedemann@suse.com
+
+- Drop environment.pickle from doc to make build reproducible
+
 -------------------------------------------------------------------
 Wed Aug  9 15:40:35 UTC 2017 - tbechtold@suse.com
 
diff --git a/python-dulwich.spec b/python-dulwich.spec
index 5be694a..87a48c6 100644
--- a/python-dulwich.spec
+++ b/python-dulwich.spec
@@ -64,6 +64,7 @@ sphinx-build -b html docs/ docs/build/html
 %python_clone -a %{buildroot}%{_bindir}/dulwich
 %python_clone -a %{buildroot}%{_bindir}/dul-receive-pack
 %python_clone -a %{buildroot}%{_bindir}/dul-upload-pack
+rm docs/build/html/.doctrees/environment.pickle
 
 %post
 %python_install_alternative dulwich