different approach; that broke 14

.github/workflows/bottle.yml

@@ -37,12 +37,11 @@ jobs:
 
       - name: build bottle
         run: |
-          # without this, macos-15 fails with a brew link error
-          brew unlink pkg-config
           brew tap viamrobotics/brews
           # note: this fails on the nlopt dep to viam-server when viam-server already exists as bottle in the formula file.
           # weird edge case. recovery is to remove the bottle stanza and delete the uploaded package, then rerun.
-          brew install --only-dependencies ${{ inputs.formula }}
+          # note: --overwrite is necessary on macos-15 CI runners where pkg-config is already present; otherwise build fails.
+          brew install --overwrite --only-dependencies ${{ inputs.formula }}
           brew install --build-bottle ${{ inputs.formula }}
           brew bottle --json --root-url $ROOT_URL ${{ inputs.formula }}