diff --git a/.github/workflows/conda-forge-ci.yml b/.github/workflows/conda-forge-ci.yml
index d76615ae02..8d4d87b318 100644
--- a/.github/workflows/conda-forge-ci.yml
+++ b/.github/workflows/conda-forge-ci.yml
@@ -10,6 +10,10 @@ on:
   # Execute a "nightly" build at 2 AM UTC
   - cron:  '0 2 * * *'
 
+# Workaround for https://github.com/conda-forge/mumps-feedstock/issues/125
+env:
+  OMP_NUM_THREADS: 1
+
 jobs:
   build:
     name: '[${{ matrix.os }}@${{ matrix.build_type }}@conda]'