ys v4.2.1`
Caused by:
  process didn't exit successfully: `/builddir/build/BUILD/libslirp-4.2.2/target/rpm/build/libslirp-sys-3427af3ef1b0b34d/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_STATIC
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=SYSROOT
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_STATIC
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
  cargo:rustc-link-search=native=/usr/lib64
  cargo:rustc-link-lib=slirp
  cargo:rustc-link-lib=glib-2.0
  cargo:rerun-if-env-changed=PKG_CONFIG_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_STATIC
  cargo:rerun-if-env-changed=SLIRP >= 4.2.0_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_riscv64gc-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_riscv64gc_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
  --- stderr
  thread 'main' panicked at /usr/share/cargo/registry/pkg-config-0.3.30/src/lib.rs:1026:53:
  called `Option::unwrap()` on a `None` value
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: Bad exit status from /var/tmp/rpm-tmp.mWET0Z (%build)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.mWET0Z (%build)
Child return code was: 1
EXCEPTION: [Error()]
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.9/site-packages/mockbuild/util.py", line 600, in do_with_status
    raise exception.Error("Command failed: \n # %s\n%s" % (command, output), child.returncode)
mockbuild.exception.Error: Command failed: 
 # bash --login -c /usr/bin/rpmbuild -ba --noprep --target riscv64 --nodeps /builddir/build/SPECS/rust-libslirp.spec