i was getting this berror when cargo build-sbf or anchor build ..:
cargo build-sbf
error: failed to parse lock file at: /home/anrchsun/devs/ana-cain/Cargo.lock
but if you all could read carefully the solution was given in error message:
Caused by:
lock file version 4 requires -Znext-lockfile-bump
so i ran 
cargo build-sbf -- -Znext-lockfile-bump
and everything worked fine...
Compiling borsh v0.9.3
Compiling anchor-attribute-access-control v0.30.1
Compiling anchor-attribute-account v0.30.1
Compiling anchor-attribute-error v0.30.1
Compiling anchor-attribute-event v0.30.1
Compiling anchor-attribute-constant v0.30.1
Compiling anchor-derive-serde v0.30.1
Compiling anchor-attribute-program v0.30.1
Compiling anchor-derive-accounts v0.30.1
^[[B Building [=======================> ] 165/169: solana-program, solana-program
Compiling anchor-lang v0.30.1
Compiling ana-chain v0.0.0 (/home/anrchsun/devs/ana-cain/program)
Finished release [optimized] target(s) in 1m 31s..
Thank you so much!! I was having the same issue. You're a lifesaver! 
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I am getting the same error again even after running the command cargo build-sbf -- -Znext-lockfile-bump
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you see this error because your rust toolchain is older than the version that generated the lock file.
if the lock file is from your own crate, you can simply delete Cargo.lock
and cargo
will regenerate the lock file automatically. you may want to make a backup first, just in case some of the dependencies may break semver.
if the lock file is from one of the dependencies, chances are your rust toolchain is older than the MSRV, or the dependency crates didn't specify their MSRV. usually this error goes away after you upgrade your rust toolchain.
Wrong Solana version
the error is du to anchor using cargo and rustc from within your Solana release not rustup update toolchains...
One thing that worked was opening corgo.lock file and putting a "3" in version instead of 4.... It will compile but you'll run into a rusc or cargo using 1.79 but you are using 1.75... Rustup update won't fix that as i said it uses rust from within solana...
To fix both errors
just update your solana cli --version to a 2.1.x version just go take a look at the different solana-program versions and rust version at crates.io...
you can go chexk out solana-program versions and rust requierments here:
(not alloud anymore links)
solana-program@=>2.1.0
using rust crates, its best to match all basiv solana instances to same version and also to use the same cli version ex: solana-program: 2.1.11 solana-sdk: 2.1.11, solana-???? 2.1.11 all the same.
Then update your solana using:
sh -c "$(curl -sSfL https://release.anza.xyz/stable/install)"
just replace /stable with v^2.1.0 or any version above 2.1.x
Then if you run into dependencies problems use the same crates.io link and search for crate or dependency and look at its dependencies and match..
Generally cargo add fetches the right version if no entry is present...
Soloana Version causes errors
its the rust from solana/active-release/... you need to use a higher solana-program version or i mean solana cli to @^2.1.x...
solana-program versions and rust 1.79 compatibilities...
Match your solana cli with solana crates versions if you ncan but use=>2.1.x...
Change solana cli version to =>2.1.0:
sh -c "$(curl -sSfL https://release.anza.xyz/stable/install)"
p.s. change /stable to v2.1.x