diff --git a/.github/workflows/re2c.yml b/.github/workflows/re2c.yml
index db7c896..39f5ec5 100644
--- a/.github/workflows/re2c.yml
+++ b/.github/workflows/re2c.yml
@@ -11,9 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-latest
         - macos-latest
-        - windows-2019
 
     steps:
       - name: Checkout repo
@@ -50,6 +48,6 @@ jobs:
       - name: publish conda package (wip)
         shell: pwsh
         run: |
-          conda build --channel potassco re2c
+          CONDA_SUBDIR=osx-64 conda build --channel potassco re2c
         env:
           ANACONDA_API_TOKEN: ${{ secrets.ANACONDA_TOKEN }}