Setup anchor locally on your machine. Run a program with your local build of anchor. Try changing the code to ensure you’re able to use your local version.

• Clone the repo
• cargo build (wait for 1 hour 😟 )
• Create a new crate

cargo init program --lib

• Add local library as a dependency

[package]
name = "program"
version = "0.1.0"
edition = "2024"

[lib]

[dependencies]
anchor-lang = { path = "../lang", features = [
    "derive",
    "event-cpi",
    "interface-instructions",
    "idl-build",
    "anchor-debug",
    "init-if-needed",
    "allow-missing-optionals",
] }

• Try compiling a simple program

use anchor_lang::prelude::*;

declare_id!("Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS");

#[program]
mod counter {
    use super::*;

    pub fn initialize(ctx: Context<Initialize>, start: u64) -> Result<()> {
        let counter = &mut ctx.accounts.counter;
        counter.authority = *ctx.accounts.authority.key;
        counter.count = start;
        Ok(())
    }

    pub fn increment(ctx: Context<Increment>) -> Result<()> {
        let counter = &mut ctx.accounts.counter;
        counter.count += 1;
        Ok(())
    }
}

#[derive(Accounts)]
pub struct Initialize<'info> {
    #[account(init, payer = authority, space = 48)]
    pub counter: Account<'info, Counter>,
    #[account(mut)]
    pub authority: Signer<'info>,
    pub system_program: Program<'info, System>,
}

#[derive(Accounts)]
pub struct Increment<'info> {
    #[account(mut, has_one = authority)]
    pub counter: Account<'info, Counter>,
    pub authority: Signer<'info>,
}

#[account]
pub struct Counter {
    pub authority: Pubkey,
    pub count: u64,
}

• Try building the project

cargo build 
or 
cargo build-sbf