From cc7e09a3507fa342b3790b5c109e700fa12f0b17 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@users.noreply.github.com>
Date: Tue, 8 Nov 2022 17:49:12 +0100
Subject: [PATCH] pin mypy to a known good version (#7269)

---
 .github/workflows/ci-additional.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci-additional.yaml b/.github/workflows/ci-additional.yaml
index 935729c055f..dd18aa365d5 100644
--- a/.github/workflows/ci-additional.yaml
+++ b/.github/workflows/ci-additional.yaml
@@ -119,7 +119,7 @@ jobs:
           python xarray/util/print_versions.py
       - name: Install mypy
         run: |
-          python -m pip install mypy
+          python -m pip install 'mypy<0.990'
 
       - name: Run mypy
         run: |