[Unit]Description=Auto update brew for mutable brew installsAfter=local-fs.targetAfter=network-online.targetConditionPathIsSymbolicLink=/home/linuxbrew/.linuxbrew/bin/brew[Service]# Override the user if different UID/UserUser=1000Type=oneshotEnvironment=HOMEBREW_CELLAR=/home/linuxbrew/.linuxbrew/CellarEnvironment=HOMEBREW_PREFIX=/home/linuxbrew/.linuxbrewEnvironment=HOMEBREW_REPOSITORY=/home/linuxbrew/.linuxbrew/HomebrewExecStart=/usr/bin/bash -c "/home/linuxbrew/.linuxbrew/bin/brew update"