Won't link when using src-build feature: cannot find -lglfw: No such file or directory

[Oxyd]

Repro:

/tmp % cargo new /tmp/foo                                                
    Creating binary (application) `foo` package
note: see more `Cargo.toml` keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
/tmp % cd /tmp/foo 
/tmp/foo % cargo add glfw-sys -F src-build
    Updating crates.io index
      Adding glfw-sys v6.0.0 to dependencies
             Features:
             + all
             + native-egl
             + native-gl
             + native-handles
             + src-build
             + vulkan
             + wayland
             + x11
             - bindgen
             - osmesa
             - prebuilt-libs
             - static-link
    Updating crates.io index
    Blocking waiting for file lock on package cache
     Locking 5 packages to latest Rust 1.88.0 compatible versions
      Adding cc v1.2.33
      Adding cmake v0.1.54
      Adding glfw-sys v6.0.0
      Adding pkg-config v0.3.32
      Adding shlex v1.3.0 
/tmp/foo % echo 'fn main() { unsafe { glfw_sys::glfwInit(); } }' >src/main.rs
/tmp/foo % cargo build -q                                                    
error: linking with `x86_64-pc-linux-gnu-cc` failed: exit status: 1
  |
  = note:  "x86_64-pc-linux-gnu-cc" "-m64" "/tmp/rustcTqYCTr/symbols.o" "<6 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/tmp/foo/target/debug/deps/{libglfw_sys-be2787758c0f1973.rlib}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,liballoc-*,librustc_std_workspace_core-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lglfw" "-lX11" "-lwayland-client" "-lm" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcTqYCTr/raw-dylibs" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/tmp/foo/target/debug/build/glfw-sys-732a9d06e9d2be24/out/lib" "-L" "/usr/lib64" "-L" "/usr/lib64" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/tmp/foo/target/debug/deps/foo-f00e61767f5adbd4" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lglfw: No such file or directory
          collect2: error: ld returned 1 exit status
          

error: could not compile `foo` (bin "foo") due to 1 previous error

Poking around, I see that the library is actually built:

/tmp/foo % find target/debug/build/glfw-sys-732a9d06e9d2be24 -name '*.so'
/tmp/foo % find target/debug/build/glfw-sys-732a9d06e9d2be24 -name '*.a' 
target/debug/build/glfw-sys-732a9d06e9d2be24/out/lib64/libglfw3.a
target/debug/build/glfw-sys-732a9d06e9d2be24/out/build/src/libglfw3.a

However,

1. It's in lib64 not lib where build.rs expects it to be.
2. It's an .a, not .so, despite the static-link feature being disabled.

Versions:

% cargo --version
cargo 1.88.0 (873a06493 2025-05-10) (gentoo)
% cmake --version
cmake version 3.31.7
% x86_64-pc-linux-gnu-cc --version
x86_64-pc-linux-gnu-cc (Gentoo 14.3.0 p8) 14.3.0