diff --git a/.github/workflows/build-dev-repo.yml b/.github/workflows/build-dev-repo.yml
index c041211291..c0623d4bbb 100644
--- a/.github/workflows/build-dev-repo.yml
+++ b/.github/workflows/build-dev-repo.yml
@@ -40,7 +40,11 @@ jobs:
 
       - name: Configure Homebrew LLVM
         if: matrix.os == 'macos-latest'
-        run: echo 'LLVM_CONFIG=/usr/local/opt/llvm@9/bin/llvm-config' >> $GITHUB_ENV
+        run: |
+          brew update
+          brew upgrade
+          rm -rf /usr/local/bin/2to3
+          echo 'LLVM_CONFIG=/usr/local/opt/llvm@9/bin/llvm-config' >> $GITHUB_ENV
 
       - name: Install system dependencies
         run: opam depext -u bap
diff --git a/.github/workflows/nightly-testing.yml b/.github/workflows/nightly-testing.yml
index efbee20889..2caed7dd99 100644
--- a/.github/workflows/nightly-testing.yml
+++ b/.github/workflows/nightly-testing.yml
@@ -31,6 +31,7 @@ jobs:
           run: |
             brew update
             brew upgrade
+            rm -rf /usr/local/bin/2to3
             echo 'LLVM_CONFIG=/usr/local/opt/llvm@9/bin/llvm-config' >> $GITHUB_ENV
 
         - name: Add the Testing Repository