Pin pip version to work around an issue in pipenv.

See pypa/pipenv#2924 for details
fourdigits · Oct 5, 2018 · 10572f3 · 10572f3
1 parent 1ffb21f
commit 10572f3
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diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,8 @@ python:
   - "3.6"
 
 install:
-  - pip install --upgrade pip setuptools
+  - pip install --upgrade pip<=18.0  # https://github.com/pypa/pipenv/issues/2924
+  - pip install --upgrade setuptools
   - pip install pipenv
   - pipenv sync --dev
 

diff --git a/Makefile b/Makefile
@@ -11,6 +11,7 @@ certdata.txt: mk-ca-bundle.pl
 
 .PHONY: develop
 develop:
+	pipenv run pip install 'pip<=18.0' # see https://github.com/pypa/pipenv/issues/2924
 	pipenv sync --dev
 
 .PHONY: test