Rust errors / Build and Cargo
Rust build error · checked with Rust 1.99.0
error[E0463]: can't find crate for `core`... the `wasm32-unknown-unknown` target may not be installed
error[E0463]: can't find crate for `core`... the `wasm32-unknown-unknown` target may not be installed
What it meansYou are building for a target (WebAssembly, ARM, musl...) whose standard library is not installed for your toolchain.
Why it happens
- First build for a new target.
- A rust-toolchain file pinning a toolchain without that target.
How to fix it
1. Add the target
rustup target add wasm32-unknown-unknown2. For a pinned toolchain
rustup target add wasm32-unknown-unknown --toolchain 1.85.0Other wordings of this error
target may not be installed, can't find crate for core, wasm32-unknown-unknown target may not be installed, can't find crate for std target
Other build errors
- error: linker `link.exe` not found
- error: linker `cc` not found
- error: failed to run custom build command for `openssl-sys`
- error: failed to select a version for the requirement
- error: failed to select a version for `libsqlite3-sys`... the package `libsqlite3-sys` lin
- error: could not compile `my-crate` (bin "my-crate") due to 1 previous error
- error: package `foo v1.2.3` cannot be built because it requires rustc 1.80 or newer, while
- feature `edition2024` is required
Up next
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