limit python deps to stuff that still works on py2

diff --git a/docs/Makefile.am b/docs/Makefile.am
index f953a64aa43ac0c6f088eaa1a09c99994dc38e10..9548e916aff27b90d58c4af0c0d74a95ebbf48be 100644 (file)
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -59,7 +59,7 @@ endif # if !HAVE_MANPAGES
 
 .venv: requirements.txt
        virtualenv .venv
-       .venv/bin/pip install -U pip setuptools setuptools-git
+       .venv/bin/pip install -U pip 'setuptools<45' setuptools-git
        .venv/bin/pip install -r requirements.txt
 
 html-docs: common/** manpages/** .venv *.rst