diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..727f86a
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,25 @@
+name: Building
+
+on:
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ghc: ['9.10', '9.8', '9.6', '9.4', '9.2', '9.0', '8.10', '8.8', '8.6', '8.4', '8.2', '8.0']
+        os: ['ubuntu-latest', 'windows-latest']
+
+    name: Build on ${{ matrix.os }} with GHC ${{ matrix.ghc }}
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: haskell-actions/setup@v2
+        with:
+          ghc-version: ${{ matrix.ghc }}
+      - run: cabal build
diff --git a/Data/Array/Base.hs b/Data/Array/Base.hs
index 6ed9236..dffc98d 100644
--- a/Data/Array/Base.hs
+++ b/Data/Array/Base.hs
@@ -47,10 +47,9 @@ import Foreign.C.Types
 import Foreign.StablePtr
 
 import Data.Char
-import GHC.Arr          ( STArray )
+import GHC.Arr          ( STArray, unsafeIndex )
 import qualified GHC.Arr as Arr
 import qualified GHC.Arr as ArrST
-import GHC.Ix           ( unsafeIndex )
 import GHC.ST           ( ST(..), runST )
 import GHC.Base         ( IO(..), divInt# )
 import GHC.Exts