diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..6cdad06
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,71 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+    branches:
+      - main
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - "macos-latest"
+          - "ubuntu-latest"
+        app:
+          - name: "cabal-fmt"
+            cmd: "nix run .#cabal-fmt -- --help"
+          - name: "fourmolu"
+            cmd: "nix run .#fourmolu -- --help"
+          - name: "hlint"
+            cmd: "nix run .#hlint -- --help"
+          - name: "haddock coverage"
+            cmd: "nix run .#haddock-cov -- --nh-help"
+          - name: "nixpkgs-fmt"
+            cmd: "nix run .#nixpkgs-fmt"
+          - name: "ormolu"
+            cmd: "nix run .#ormolu -- --help"
+          - name: "stylish"
+            cmd: "nix run .#stylish -- --help"
+          - name: "help"
+            cmd: "nix run .#help"
+          - name: "version"
+            cmd: "nix run .#version"
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup nix
+        uses: cachix/install-nix-action@v22
+        with:
+          nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/b39924fc7764c08ae3b51beef9a3518c414cdb7d.tar.gz
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+
+      - name: Check
+        run: nix flake check
+
+      - name: Test ${{ matrix.app.name }}
+        run: ${{ matrix.app.cmd }}
+
+  style:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup nix
+        uses: cachix/install-nix-action@v22
+        with:
+          nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/b39924fc7764c08ae3b51beef9a3518c414cdb7d.tar.gz
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+
+      - name: nixpkgs-fmt
+        run: nix run .#nixpkgs-fmt -- --check
diff --git a/.github/workflows/nix.yaml b/.github/workflows/nix.yaml
deleted file mode 100644
index af6ebd7..0000000
--- a/.github/workflows/nix.yaml
+++ /dev/null
@@ -1,56 +0,0 @@
-name: nix
-
-on:
-  push:
-    branches:
-      - main
-
-  pull_request:
-    branches:
-      - main
-
-  workflow_dispatch:
-
-jobs:
-  nix:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3.0.2
-
-      - name: Setup nix
-        uses: cachix/install-nix-action@v17
-        with:
-          nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/b39924fc7764c08ae3b51beef9a3518c414cdb7d.tar.gz
-          extra_nix_config: |
-            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-
-      - name: Check
-        run: nix flake check
-
-      - name: Test cabal-fmt
-        run: nix run .#cabal-fmt -- --help
-
-      - name: Test fourmolu
-        run: nix run .#fourmolu -- --help
-
-      - name: Test hlint
-        run: nix run .#hlint -- --help
-
-      - name: Test haddock coverage
-        run: nix run .#haddock-cov -- --nh-help
-
-      # for some reason, 'nix run .#nixpkgs-fmt -- --help' dies on ci
-      - name: Test nixpkgs-fmt
-        run: nix run .#nixpkgs-fmt
-
-      - name: Test ormolu
-        run: nix run .#ormolu -- --help
-
-      - name: Test stylish
-        run: nix run .#stylish -- --help
-
-      - name: Test help
-        run: nix run .#help
-
-      - name: Test version
-        run: nix run .#version
diff --git a/.github/workflows/style.yaml b/.github/workflows/style.yaml
deleted file mode 100644
index 4753fa7..0000000
--- a/.github/workflows/style.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-name: style
-
-on:
-  push:
-    branches:
-      - main
-
-  pull_request:
-    branches:
-      - main
-  
-  workflow_dispatch:
-
-jobs:
-  check-style:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3.0.2
-
-      - name: Setup nix
-        uses: cachix/install-nix-action@v17
-        with:
-          nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/b39924fc7764c08ae3b51beef9a3518c414cdb7d.tar.gz
-          extra_nix_config: |
-            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-
-      - name: nixpkgs-fmt
-        run: nix run .#nixpkgs-fmt -- --check
\ No newline at end of file
diff --git a/README.md b/README.md
index 24cfe35..9b10e2a 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,7 @@
 
 [![GitHub release (latest SemVer)](https://img.shields.io/github/v/tag/tbidne/nix-hs-tools?include_prereleases&sort=semver)](https://github.com/tbidne/nix-hs-tools/releases/)
 ![haskell](https://img.shields.io/static/v1?label=&message=9.4&logo=haskell&logoColor=655889&labelColor=2f353e&color=655889)
-[![nix](http://img.shields.io/github/actions/workflow/status/tbidne/nix-hs-tools/nix.yaml?branch=main&label=nix&logo=nixos&logoColor=85c5e7&labelColor=2f353c)](https://github.com/tbidne/nix-hs-tools/actions/workflows/nix.yaml)
-[![style](http://img.shields.io/github/actions/workflow/status/tbidne/nix-hs-tools/style.yaml?branch=main&label=style&logoColor=white&labelColor=2f353c)](https://github.com/tbidne/nix-hs-tools/actions/workflows/style.yaml)
+[![ci](http://img.shields.io/github/actions/workflow/status/tbidne/nix-hs-tools/ci.yaml?branch=main&logoColor=85c5e7&labelColor=2f353c)](https://github.com/tbidne/nix-hs-tools/actions/workflows/ci.yaml)
 [![MIT](https://img.shields.io/github/license/tbidne/nix-hs-tools?color=blue)](https://opensource.org/licenses/MIT)
 
 ### Haskell development tools by Nix