Error message trying the comand "cabal build" installing my cardano node

Staking & Delegation Setup a Stake Pool
8

Right, it looks like you’re running the right version, so I think your path is ok.

Did you run cabal update before starting to build the cardano-node as per the example below?

# Cabal to PATH
ENV PATH="/root/.cabal/bin:${PATH}"

ENV CARDANO_VERSION="1.21.1"
WORKDIR /build/cardano-node
RUN git clone --branch ${CARDANO_VERSION} https://github.com/input-output-hk/cardano-node.git && \
    cd cardano-node && \
    cabal update && \
    cabal build all

?