Fix CI jobs with new recommended nix shell

Author: ch1bo

.github/workflows/ci.yaml

@@ -40,26 +40,24 @@ jobs:
         restore-keys: |
           cabal-${{ runner.os }}-${{ hashFiles('cabal.project', 'default.nix', 'shell.nix') }}
 
-    - name: Prepare nix shell
-      run:
-        nix develop --build
+    - name: Enter nix shell
+      uses: nicknovitski/nix-develop@v1
+      with:
+        arguments: "github:input-output-hk/devx#ghc96"
 
     - name: Formatting
-      run:
-        nix develop --command fourmolu --mode check .
+      run: fourmolu --mode check .
 
     - name: Build
       run: |
-        nix develop --command cabal update
-        nix develop --command cabal build all --ghc-options=-Werror
+        cabal update
+        cabal build all --ghc-options=-Werror
 
     - name: Test
-      run:
-        nix develop --command cabal test all
+      run: cabal test all
 
     - name: Documentation (Haddock)
-      run: |
-        nix develop --command .github/workflows/ci-haddock.sh
+      run: .github/workflows/ci-haddock.sh
 
     - name: Upload Documentation
       uses: actions/upload-artifact@v4

.github/workflows/release.yaml

@@ -34,19 +34,20 @@ jobs:
         key: |
           cabal-${{ runner.os }}-${{ hashFiles('cabal.project', 'default.nix', 'shell.nix') }}
 
-    - name: Prepare nix shell
-      run:
-        nix develop --build
+    - name: Enter nix shell
+      uses: nicknovitski/nix-develop@v1
+      with:
+        arguments: "github:input-output-hk/devx#ghc96"
 
     - name: Cabal check
       run: |
         cd quickcheck-dynamic
-        nix develop --command cabal check
+        cabal check
 
     - name: Package
       run: |
-        nix develop --command cabal sdist quickcheck-dynamic
-        nix develop --command cabal haddock --haddock-for-hackage quickcheck-dynamic
+        cabal sdist quickcheck-dynamic
+        cabal haddock --haddock-for-hackage quickcheck-dynamic
 
     - name: Get the version
       id: get_version