Hugo 0.40.3 Netlify Build Error

And… I misread the version in the topic title. You want 0.40.3 not 0.43

[build.environment]
HUGO_VERSION_DOWNLOAD = "0.40.3"
TZ = "Europe/Oslo"

[build]
publish = "public"

command = """\
  mkdir -p "${HOME}/.local/bin" && \
  curl -sLJO "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION_DOWNLOAD}/hugo_${HUGO_VERSION_DOWNLOAD}_Linux-64bit.tar.gz" && \
  tar -C "${HOME}/.local/bin" -xf "hugo_${HUGO_VERSION_DOWNLOAD}_Linux-64bit.tar.gz" && \
  rm "hugo_${HUGO_VERSION_DOWNLOAD}_Linux-64bit.tar.gz" && \
  git config core.quotepath false && \
  export PATH="${HOME}/.local/bin:${PATH}" && \
  hugo version && \
  hugo --gc --baseURL "${URL}"
  """

Works great.