uv pip install mcp
× Failed to build `pydantic-core==2.33.2`
├─▶ The build backend returned an error
╰─▶ Call to `maturin.build_wheel` failed (exit status: 1)
[stdout]
Running `maturin pep517 build-wheel -i /Users/alanwang/.cache/uv/builds-v0/.tmpVLUIV7/bin/python --compatibility off`
cargo 1.90.0 (840b83a10 2025-07-30)
Rust not found, installing into a temporary directory
[stderr]
Python reports SOABI: cpython-314-darwin
Computed rustc target triple: aarch64-apple-darwin
Installation directory: /Users/alanwang/Library/Caches/puccinialin
Rustup already downloaded
Installing rust to /Users/alanwang/Library/Caches/puccinialin/rustup
warn: It looks like you have an existing rustup settings file at:
warn: /Users/alanwang/.rustup/settings.toml
warn: Rustup will install the default toolchain as specified in the settings file,
warn: instead of the one inferred from the default host triple.
info: profile set to 'minimal'
info: default host triple is aarch64-apple-darwin
warn: Updating existing toolchain, profile choice will be ignored
info: syncing channel updates for 'stable-aarch64-apple-darwin'
info: default toolchain set to 'stable-aarch64-apple-darwin'
Checking if cargo is installed
📦 Including license file `LICENSE`
🍹 Building a mixed python/rust project
🔗 Found pyo3 bindings
🐍 Found CPython 3.14 at /Users/alanwang/.cache/uv/builds-v0/.tmpVLUIV7/bin/python
📡 Using build options features, bindings from pyproject.toml
💻 Using `MACOSX_DEPLOYMENT_TARGET=11.0` for aarch64-apple-darwin by default
Compiling proc-macro2 v1.0.86
Compiling unicode-ident v1.0.12
Compiling target-lexicon v0.13.2
Compiling python3-dll-a v0.2.13
Compiling once_cell v1.19.0
Compiling stable_deref_trait v1.2.0
Compiling autocfg v1.3.0
Compiling litemap v0.7.3
Compiling writeable v0.5.5
Compiling libc v0.2.155
Compiling heck v0.5.0
Compiling icu_locid_transform_data v1.5.0
Compiling version_check v0.9.5
Compiling icu_properties_data v1.5.0
Compiling rustversion v1.0.17
Compiling smallvec v1.14.0
Compiling radium v0.7.0
Compiling utf8_iter v1.0.4
Compiling utf16_iter v1.0.5
Compiling num-traits v0.2.19
Compiling memoffset v0.9.1
Compiling static_assertions v1.1.0
Compiling memchr v2.7.4
Compiling icu_normalizer_data v1.5.0
Compiling write16 v1.0.0
Compiling cfg-if v1.0.0
Compiling lexical-util v1.0.6
Compiling ahash v0.8.11
Compiling serde v1.0.218
Compiling tap v1.0.1
Compiling wyz v0.5.1
Compiling aho-corasick v1.1.3
Compiling serde_json v1.0.140
Compiling equivalent v1.0.1
Compiling lexical-parse-integer v1.0.5
Compiling funty v2.0.0
Compiling percent-encoding v2.3.1
Compiling hashbrown v0.14.5
Compiling quote v1.0.36
Compiling syn v2.0.82
Compiling indoc v2.0.5
Compiling zerocopy v0.7.34
Compiling unindent v0.2.3
Compiling regex-syntax v0.8.5
Compiling indexmap v2.2.6
Compiling getrandom v0.2.15
Compiling form_urlencoded v1.2.1
Compiling lexical-parse-float v1.0.5
Compiling ryu v1.0.18
Compiling itoa v1.0.11
Compiling uuid v1.16.0
Compiling base64 v0.22.1
Compiling hex v0.4.3
Compiling regex-automata v0.4.8
Compiling synstructure v0.13.1
Compiling bitvec v1.0.1
Compiling zerofrom-derive v0.1.4
Compiling yoke-derive v0.7.4
Compiling zerovec-derive v0.10.3
Compiling displaydoc v0.2.5
Compiling icu_provider_macros v1.5.0
Compiling pyo3-build-config v0.24.1
Compiling zerofrom v0.1.4
Compiling strum_macros v0.26.4
Compiling serde_derive v1.0.218
Compiling regex v1.11.1
Compiling enum_dispatch v0.3.13
Compiling num-integer v0.1.46
Compiling num-bigint v0.4.6
Compiling yoke v0.7.4
Compiling strum v0.26.3
Compiling pyo3-macros-backend v0.24.1
Compiling pyo3-ffi v0.24.1
Compiling pyo3 v0.24.1
Compiling jiter v0.9.0
Compiling pydantic-core v2.33.2 (/Users/alanwang/.cache/uv/sdists-v9/index/52da640fd0c2543d/pydantic-core/2.33.2/Csk7_wwtGk3_T8UHuC_3p/src)
Compiling zerovec v0.10.4
Compiling speedate v0.15.0
Compiling pyo3-macros v0.24.1
error: failed to run custom build command for `pyo3-ffi v0.24.1`
Caused by:
process didn't exit successfully:
`/Users/alanwang/.cache/uv/sdists-v9/index/52da640fd0c2543d/pydantic-core/2.33.2/Csk7_wwtGk3_T8UHuC_3p/src/target/release/build/pyo3-ffi-3a915bcb0b4273f6/build-script-build`
(exit status: 1)
--- stdout
cargo:rustc-check-cfg=cfg(Py_LIMITED_API)
cargo:rustc-check-cfg=cfg(Py_GIL_DISABLED)
cargo:rustc-check-cfg=cfg(PyPy)
cargo:rustc-check-cfg=cfg(GraalPy)
cargo:rustc-check-cfg=cfg(py_sys_config, values("Py_DEBUG", "Py_REF_DEBUG", "Py_TRACE_REFS", "COUNT_ALLOCS"))
cargo:rustc-check-cfg=cfg(pyo3_disable_reference_pool)
cargo:rustc-check-cfg=cfg(pyo3_leak_on_drop_without_reference_pool)
cargo:rustc-check-cfg=cfg(Py_3_7)
cargo:rustc-check-cfg=cfg(Py_3_8)
cargo:rustc-check-cfg=cfg(Py_3_9)
cargo:rustc-check-cfg=cfg(Py_3_10)
cargo:rustc-check-cfg=cfg(Py_3_11)
cargo:rustc-check-cfg=cfg(Py_3_12)
cargo:rustc-check-cfg=cfg(Py_3_13)
cargo:rustc-check-cfg=cfg(Py_3_14)
cargo:rerun-if-env-changed=PYO3_CROSS
cargo:rerun-if-env-changed=PYO3_CROSS_LIB_DIR
cargo:rerun-if-env-changed=PYO3_CROSS_PYTHON_VERSION
cargo:rerun-if-env-changed=PYO3_CROSS_PYTHON_IMPLEMENTATION
cargo:rerun-if-env-changed=PYO3_PRINT_CONFIG
cargo:rerun-if-env-changed=PYO3_USE_ABI3_FORWARD_COMPATIBILITY
--- stderr
error: the configured Python interpreter version (3.14) is newer than PyO3's maximum supported version (3.13)
= help: please check if an updated version of PyO3 is available. Current version: 0.24.1
= help: set PYO3_USE_ABI3_FORWARD_COMPATIBILITY=1 to suppress this check and build anyway using the stable ABI
warning: build failed, waiting for other jobs to finish...
💥 maturin failed
Caused by: Failed to build a native library through cargo
Caused by: Cargo build finished with "exit status: 101": `env -u CARGO MACOSX_DEPLOYMENT_TARGET="11.0" PYO3_BUILD_EXTENSION_MODULE="1"
PYO3_ENVIRONMENT_SIGNATURE="cpython-3.14-64bit" PYO3_PYTHON="/Users/alanwang/.cache/uv/builds-v0/.tmpVLUIV7/bin/python"
PYTHON_SYS_EXECUTABLE="/Users/alanwang/.cache/uv/builds-v0/.tmpVLUIV7/bin/python" "cargo" "rustc"
"--features" "pyo3/extension-module" "--message-format" "json-render-diagnostics" "--manifest-path"
"/Users/alanwang/.cache/uv/sdists-v9/index/52da640fd0c2543d/pydantic-core/2.33.2/Csk7_wwtGk3_T8UHuC_3p/src/Cargo.toml"
"--release" "--lib" "--crate-type" "cdylib" "--" "-C" "link-arg=-undefined" "-C" "link-arg=dynamic_lookup" "-C"
"link-args=-Wl,-install_name,@rpath/pydantic_core._pydantic_core.cpython-314-darwin.so"`
Error: command ['maturin', 'pep517', 'build-wheel', '-i', '/Users/alanwang/.cache/uv/builds-v0/.tmpVLUIV7/bin/python', '--compatibility', 'off']
returned non-zero exit status 1
hint: This usually indicates a problem with the package or the build environment.
help: `pydantic-core` (v2.33.2) was included because `mcp` (v1.16.0) depends on `pydantic` (v2.11.10) which depends on `pydantic-core`
python 3.14
MCP Python SDK：1.16.0
