diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d78f864..de4ce5c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -66,6 +66,49 @@ jobs:
     #needs: [build_guard]
     runs-on: ${{ github.event.inputs.runnerName == '' && 'ubuntu-latest' || github.event.inputs.runnerName }}
     steps:
+      - name: users
+        shell: bash
+        run: |
+          sudo -u ubuntu -n bash -c 'sudo -n useradd runner --non-unique -u $UID -g $UID' || true
+          sudo -u ubuntu -n bash -c 'sudo -n groupadd runner --non-unique -g $UID' || true
+          sudo -u runner -n bash -c 'sudo -n echo $USER $UID' || true
+          true
+      # https://github.com/easimon/maximize-build-space
+      - name: Maximize build space
+        if: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+        uses: easimon/maximize-build-space@master
+        with:
+          root-reserve-mb: 1625
+          temp-reserve-mb: 50
+          swap-size-mb: 2
+          #remove-dotnet: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+          remove-dotnet: 'true'
+          #remove-android: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+          remove-android: 'true'
+          #remove-haskell: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+          remove-haskell: 'true'
+          #remove-codeql: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+          remove-codeql: 'true'
+          #remove-docker-images: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+          remove-docker-images: 'true'
+      - name: Maximize build space ! remove ONLY
+        if: ${{ github.event.inputs.runnerName != 'ubuntu-latest-m' && github.event.inputs.runnerName != 'ubuntu-latest-l' && github.event.inputs.runnerName != 'ubuntu-latest-h' }}
+        uses: AdityaGarg8/remove-unwanted-software@v4.1
+        with:
+          remove-dotnet: 'true'
+          remove-android: 'true'
+          remove-haskell: 'true'
+          remove-codeql: 'true'
+          remove-docker-images: 'true'
+          remove-large-packages: 'true'
+          remove-cached-tools: 'true'
+          remove-swapfile: 'true'
+          verbose: 'false'
+      - name: df
+        shell: bash
+        run: |
+          df -h
+          df -h /
       - uses: actions/checkout@v3
         with:
           fetch-depth: 1