diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b332efa..40e1986 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -115,6 +115,7 @@ jobs:
       - name: Build
         shell: cmd /C call {0}
         run: |
+          micromamba activate xeus-zmq
           set CL=/MP
           ninja install
         working-directory: build
@@ -126,6 +127,7 @@ jobs:
           max_attempts: 4
           shell: cmd
           command: |
+            micromamba activate xeus-zmq
             set PATH=%CONDA_PREFIX%;%CONDA_PREFIX%\\Scripts;%CONDA_PREFIX%\\Library;%CONDA_PREFIX%\\Library\\bin;%PATH%
             cd build
             ctest --output-on-failure