Pass --dirty flag to conda-build

Author: ndgrigorian

.github/workflows/conda-package.yml

@@ -35,8 +35,10 @@ jobs:
         run: |
           # use bootstrap channel to pull NumPy linked with OpenBLAS
           CHANNELS="-c conda-forge --override-channels"
+          DIRTY="--dirty"
           conda build \
             $CHANNELS \
+            $DIRTY \
             recipe
 
       - name: Upload artifact