Upper bound pip in CI

.circleci/config.yml

@@ -168,6 +168,8 @@ jobs:
       python_version:
         type: string
     executor: win/default
+    environment:
+      PIP_DISABLE_PIP_VERSION_CHECK: 1
     steps:
       - checkout
       - win_setup_conda:

Makefile

@@ -10,7 +10,7 @@ clean:
 	pre-commit clean || true
 
 install-pip-setuptools:
-	python -m pip install -U "pip>=20.0" "setuptools>=38.0" wheel
+	python -m pip install -U "pip~=21.2" "setuptools>=38.0" wheel
 
 lint:
 	pre-commit run -a --hook-stage manual $(hook)

features/environment.py

@@ -107,7 +107,7 @@ def _setup_minimal_env(context):
             "pip",
             "install",
             "-U",
-            "pip>=20.0",
+            "pip~=21.2",
             "setuptools>=38.0",
             "wheel",
         ],

tools/circleci/requirements.txt

@@ -1,3 +1,3 @@
-pip>=20.0
+pip~=21.2
 setuptools>=38.0
 twine~=3.0