nix-shell , it manages the environment and dependencies for you.nix-shell.nix-shell is ready, change directory to code folder, for example:cabal build or cabal replas you need. (You may need to run cabal update first.)error: cannot update the ref 'refs/remotes/origin/master': unable to append to '.git/logs/refs/remotes/origin/master': Permission denied From https://github.com/input-output-hk/cardano-ledger-specs ! 54490eff..07388041 master -> origin/master (unable to update local ref) error: cannot lock ref 'refs/remotes/origin/polina/min-utxo-alonzo': Unable to create '/home/alvin/workspace/cardano/plutus-pioneer-program/code/week02/dist-newstyle/src/cardano-l_-48e3a74bf8b61f34/.git/refs/remotes/origin/polina/min-utxo-alonzo.lock': Permission denied ! [new branch] polina/min-utxo-alonzo -> origin/polina/min-utxo-alonzo (unable to update local ref) error: cannot update the ref 'refs/remotes/origin/ts-checkPlutusBytes-toolong': unable to append to '.git/logs/refs/remotes/origin/ts-checkPlutusBytes-toolong': Permission denied ! 29c29d36..3789adfd ts-checkPlutusBytes-toolong -> origin/ts-checkPlutusBytes-toolong (unable to update local ref)