Fix python-utils version

Recent python-utils (pulled by progressbar2) is incompatible with older
Python.

diff --git a/symbiflow-install b/symbiflow-install
index c59c98e502ff3b9a401641c326b5040dab8a7b0f..2527cbcc7ca686683808e8bf06b4f37943e42019 100755 (executable)
--- a/symbiflow-install
+++ b/symbiflow-install
@@ -324,8 +324,8 @@ apt-get install -y nodejs npm python-pytest openocd flake8 python3-numpy \
   python3-typing-extensions python3-ply
 
 pip3 install textx fasm pyjson5 pyyaml tinyfpgab tinyprog pyjson lxml \
-  progressbar2 hilbertcurve==1.0.5 python-constraint parameterized \
-  yapf==0.26.0 python-sat
+  python-utils==3.4.5 progressbar2 hilbertcurve==1.0.5 python-constraint \
+  parameterized yapf==0.26.0 python-sat
 
 cd symbiflow-arch-defs
 git checkout c2c0f00960baf538eb31e4c42bf5d09dca87bad7