Failed to Install RISC-V targets for 'stable' toolchain

[wcampbell0x2a]

Bug description

$ espup install -l debug
[debug]: Call<Prepare>
[debug]: GET https://crates.io/******
[debug]: Resolved: ArrayVec { len: 12, arr: [18.238.25.56:443, 18.238.25.70:443, 18.238.25.122:443, 18.238.25.127:443, [2600:9000:25f5:2600:c:7ed3:240:93a1]:443, [2600:9000:25f5:4e00:c:7ed3:240:93a1]:443, [2600:9000:25f5:da00:c:7ed3:240:93a1]:443, [2600:9000:25f5:7000:c:7ed3:240:93a1]:443, [2600:9000:25f5:3c00:c:7ed3:240:93a1]:443, [2600:9000:25f5:1600:c:7ed3:240:93a1]:443, [2600:9000:25f5:fe00:c:7ed3:240:93a1]:443, [2600:9000:25f5:e600:c:7ed3:240:93a1]:443] }
[debug]: Connected TcpStream to 18.238.25.56:443
[debug]: No cached session for DnsName("crates.io")
[debug]: Not resuming any session
[debug]: Wrapped TLS
[debug]: Call<SendRequest>
[debug]: Request { method: GET, uri: https://crates.io/******, version: HTTP/1.1, headers: {"accept-encoding": "gzip", "user-agent": "ureq/3.1.2", "accept": "*/*", "host": "crates.io"} }
[debug]: Using ciphersuite TLS13_AES_128_GCM_SHA256
[debug]: Not resuming
[debug]: TLS1.3 encrypted extensions: ServerExtensions { server_name_ack: (), unknown_extensions: {}, .. }
[debug]: ALPN protocol is None
[debug]: Call<RecvResponse>
[debug]: Call<RecvBody>
[debug]: Response { status: 200, version: HTTP/1.1, headers: {"content-type": "application/json", "transfer-encoding": "chunked", "connection": "keep-alive", "content-encoding": "gzip", "date": "Thu, 04 Dec 2025 04:20:38 GMT", "server": "Heroku", "<NOTICE>": "14 HEADERS ARE REDACTED"} }
[debug]: Decoding gzip
[debug]: Call<Cleanup>
[debug]: Return to pool: PoolKey { scheme: "https", authority: crates.io, proxy: None }
[info]: Installing the Espressif Rust ecosystem
[debug]: Querying latest Xtensa Rust version from GitHub API
[debug]: Querying GitHub API: 'https://api.github.com/repos/esp-rs/rust-build/releases/latest'
[debug]: starting new connection: https://api.github.com/
[debug]: Parsing Xtensa Rust version: 1.90.0.0
[debug]: Querying GitHub API: 'https://api.github.com/repos/esp-rs/rust-build/releases?page=1&per_page=100'
[debug]: starting new connection: https://api.github.com/
[debug]: Latest Xtensa Rust version: 1.90.0.0
[debug]: Arguments:
            - Export file: "/home/wcampbell/export-esp.sh"
            - Host triple: x86_64-unknown-linux-gnu
            - LLVM Toolchain: Llvm { extended: false, file_name_libs: Some("libs-clang-esp-20.1.1_20250829-x86_64-linux-gnu.tar.xz"), file_name_full: None, host_triple: X86_64UnknownLinuxGnu, path: "/home/wcampbell/.rustup/toolchains/esp/xtensa-esp32-elf-clang/esp-20.1.1_20250829", repository_url: "https://github.com/espressif/llvm-project/releases/download/esp-20.1.1_20250829", version: "esp-20.1.1_20250829" }
            - Stable version: "stable"
            - Rust Toolchain: Some(XtensaRust { cargo_home: "/home/wcampbell/.cargo", dist_file: "rust-1.90.0.0-x86_64-unknown-linux-gnu.tar.xz", dist_url: "https://github.com/esp-rs/rust-build/releases/download/v1.90.0.0/rust-1.90.0.0-x86_64-unknown-linux-gnu.tar.xz", host_triple: "x86_64-unknown-linux-gnu", path: "/home/wcampbell/.rustup/toolchains/esp", rustup_home: "/home/wcampbell/.rustup", src_dist_file: "rust-src-1.90.0.0.tar.xz", src_dist_url: "https://github.com/esp-rs/rust-build/releases/download/v1.90.0.0/rust-src-1.90.0.0.tar.xz", toolchain_destination: "/home/wcampbell/.rustup/toolchains/esp", version: "1.90.0.0" })
            - Skip version parsing: false
            - Targets: {ESP32P4, ESP32C2, ESP32C6, ESP32S2, ESP32S3, ESP32C3, ESP32H2, ESP32}
            - Toolchain path: "/home/wcampbell/.rustup/toolchains/esp"
            - Toolchain version: None
[info]: Checking Rust installation
[info]: Installing RISC-V Rust targets ('riscv32imc-unknown-none-elf', 'riscv32imac-unknown-none-elf' and 'riscv32imafc-unknown-none-elf') for 'stable' toolchain
[info]: Installing GCC (xtensa-esp-elf)
[debug]: GCC path: /home/wcampbell/.rustup/toolchains/esp/xtensa-esp-elf/esp-15.2.0_20250920
[warn]: Previous installation of LLVM exists in: '/home/wcampbell/.rustup/toolchains/esp/xtensa-esp32-elf-clang/esp-20.1.1_20250829'. Reusing this installation
[warn]: Previous installation of GCC exists in: '/home/wcampbell/.rustup/toolchains/esp/xtensa-esp-elf/esp-15.2.0_20250920'. Reusing this installation
[info]: Creating symlink between '/home/wcampbell/.rustup/toolchains/esp/xtensa-esp32-elf-clang/esp-20.1.1_20250829/esp-clang/lib' and '/home/wcampbell/.espup/esp-clang'
[warn]: Previous installation of Xtensa Rust 1.90.0.0 exists in: '/home/wcampbell/.rustup/toolchains/esp'. Reusing this installation
[warn]: Installation for 'RISC-V Rust target' failed, retrying. Error: Failed to Install RISC-V targets for 'stable' toolchain
[info]: Installing RISC-V Rust targets ('riscv32imc-unknown-none-elf', 'riscv32imac-unknown-none-elf' and 'riscv32imafc-unknown-none-elf') for 'stable' toolchain
[warn]: Installation for 'RISC-V Rust target' failed, retrying. Error: Failed to Install RISC-V targets for 'stable' toolchain
[info]: Installing RISC-V Rust targets ('riscv32imc-unknown-none-elf', 'riscv32imac-unknown-none-elf' and 'riscv32imafc-unknown-none-elf') for 'stable' toolchain
[warn]: Installation for 'RISC-V Rust target' failed, retrying. Error: Failed to Install RISC-V targets for 'stable' toolchain
[info]: Installing RISC-V Rust targets ('riscv32imc-unknown-none-elf', 'riscv32imac-unknown-none-elf' and 'riscv32imafc-unknown-none-elf') for 'stable' toolchain
[warn]: Installation for 'RISC-V Rust target' failed, retrying. Error: Failed to Install RISC-V targets for 'stable' toolchain
Error: espup::toolchain::rust::install_riscv_target

  × Failed to Install RISC-V targets for 'stable' toolchain

Environment

• OS: Arch Linux
• espup version: 0.16.0

Additional context

[SergioGasquez]

Hi! Thanks for reporting the issue, this is very similar to an old issue that we had which was fixed in #480 #481, not sure what changed, Ill take a look! In the meantime, what is your target?? I assume its an Xtensa target, can you try espup install -t esp32,esp32s2, esp32s3 and if its a RISC-V, follow https://docs.espressif.com/projects/rust/book/getting-started/toolchain.html#risc-v-devices