CI: use Cabal Store env variable that alredy provided by default

In & below:
https://github.com/haskell/actions/blob/45e670e88ef506f3c7c305ffa3abbf1c08a38d63/setup/lib/setup-haskell.js#L61

is seen that it is exact Windows & Linux & macOS settings.

No need to guess with matching the CABAL_STORE variable to reality, while
haskell action already gives the value of that variable.

Author: Anton-Latukha

.github/workflows/cache-deps.yml

@@ -57,21 +57,21 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: true
+
       - uses: haskell/actions/setup@v1
+        id: HaskEnvSetup
         with:
           ghc-version: ${{ matrix.ghc }}
           cabal-version: "3.4"
 
       - if: matrix.os == 'windows-latest'
         name: Set some window specific things
         run: |
-          echo "CABAL_STORE_DIR=$SYSTEMDRIVE\\SR" >> $GITHUB_ENV
           echo "CABAL_PKGS_DIR=~\\AppData\\cabal\\packages" >> $GITHUB_ENV
 
       - if: (${{ env.RUNNER_OS }} == 'Linux') || (${{ env.RUNNER_OS}} == 'macOS')
         name: Set some Linux/macOS specific things
         run: |
-          echo "CABAL_STORE_DIR=~/.cabal/store" >> $GITHUB_ENV
           echo "CABAL_PKGS_DIR=~/.cabal/packages" >> $GITHUB_ENV
 
       - if: matrix.os == 'macOS-latest' && matrix.ghc == '8.10.5'
@@ -97,8 +97,8 @@ jobs:
           cache-name: cache-cabal
         with:
           path: |
+            ${{ steps.HaskEnvSetup.outputs.cabal-store }}
             ${{ env.CABAL_PKGS_DIR }}
-            ${{ env.CABAL_STORE_DIR }}
           key: v2-${{ runner.os }}-${{ matrix.ghc }}-build-${{ hashFiles('cabal.project') }}
           restore-keys: v2-${{ runner.os }}-${{ matrix.ghc }}-build-
 

.github/workflows/test.yml

@@ -78,6 +78,7 @@ jobs:
         with:
           submodules: true
       - uses: haskell/actions/setup@v1
+        id: HaskEnvSetup
         with:
           ghc-version: ${{ matrix.ghc }}
           cabal-version: "3.4"
@@ -88,14 +89,12 @@ jobs:
       - if: ${{ env.RUNNER_OS }} == 'Windows'
         name: Set some window specific things
         run: |
-          echo "CABAL_STORE_DIR=$SYSTEMDRIVE\\SR" >> $GITHUB_ENV
           echo "CABAL_PKGS_DIR=~\\AppData\\cabal\\packages" >> $GITHUB_ENV
 
 
       - if: (${{ env.RUNNER_OS }} == 'Linux') || (${{ env.RUNNER_OS}} == 'macOS')
         name: Set some Linux/macOS specific things
         run: |
-          echo "CABAL_STORE_DIR=~/.cabal/store" >> $GITHUB_ENV
           echo "CABAL_PKGS_DIR=~/.cabal/packages" >> $GITHUB_ENV
 
       - if: matrix.os == 'macOS-latest' && matrix.ghc == '8.10.5'
@@ -121,8 +120,8 @@ jobs:
           cache-name: cache-cabal
         with:
           path: |
+            ${{ steps.HaskEnvSetup.outputs.cabal-store }}
             ${{ env.CABAL_PKGS_DIR }}
-            ${{ env.CABAL_STORE_DIR }}
           restore-keys: v2-${{ runner.os }}-${{ matrix.ghc }}-build-
 
       - run: cabal update