diff --git a/.github/workflows/arm64-rpi-debian12-lean-image.yml b/.github/workflows/arm64-rpi-debian12-lean-image.yml
index e4693bed5..56c2c416d 100644
--- a/.github/workflows/arm64-rpi-debian12-lean-image.yml
+++ b/.github/workflows/arm64-rpi-debian12-lean-image.yml
@@ -44,7 +44,7 @@ jobs:
       - name: Run the build script
         run: |
           cd ci/arm64-rpi
-          bash packer.build.arm64-rpi.sh lean $GITHUB_ACTOR $GITHUB_HEAD_REF "https://raspi.debian.net/tested/20230612_raspi_4_bookworm.img.xz" "a68cd2bfe7831c438d8a5d832803ae0db17afec9f3cd370d9e8748c7b5456283"
+          bash packer.build.arm64-rpi.sh "lean" "$GITHUB_ACTOR" "$GITHUB_HEAD_REF" "https://raspi.debian.net/tested/20230612_raspi_4_bookworm.img.xz" "a68cd2bfe7831c438d8a5d832803ae0db17afec9f3cd370d9e8748c7b5456283"
 
       - name: Compute checksum of the raw image
         run: |