diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index 8fc201a1..6d067530 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -3,6 +3,7 @@ name: Haskell CI
 on:
   pull_request:
   merge_group:
+  workflow_dispatch:
 
 jobs:
   build:
@@ -29,24 +30,10 @@ jobs:
         ghc-version: ${{ matrix.ghc }}
         cabal-version: "3.12.1.0"
 
-    - name: Install LLVM (macOS)
-      if: runner.os == 'macOS' && matrix.ghc == '8.10'
-      run: |
-        brew install llvm@13
-        echo "LLVM_CONFIG=$(brew --prefix llvm@13)/bin/llvm-config" >> $GITHUB_ENV
-        echo "$(brew --prefix llvm@13)/bin" >> $GITHUB_PATH
-
-    - name: Verify LLVM installation
-      if: runner.os == 'macOS' && matrix.ghc == '8.10'
-      run: |
-        llvm-config --version
-        opt --version
-
     - name: Print environment variables
       if: runner.os == 'macOS' && matrix.ghc == '8.10'
       run: |
         echo "PATH = $PATH"
-        echo "LLVM_CONFIG = $LLVM_CONFIG"
 
     - uses: actions/checkout@v4