Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
error: failed to run custom build command for `libcryptsetup-rs-sys v0.4.1 (/builddir/build/BUILD/rust-libcryptsetup-rs-sys-0.4.1-build/libcryptsetup-rs-sys-0.4.1)`
Caused by:
  process didn't exit successfully: `/builddir/build/BUILD/rust-libcryptsetup-rs-sys-0.4.1-build/libcryptsetup-rs-sys-0.4.1/target/rpm/build/libcryptsetup-rs-sys-3d90adc1219a44ec/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-env-changed=LIBCRYPTSETUP_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_i686-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_i686_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=LIBCRYPTSETUP_STATIC
  cargo:rerun-if-env-changed=LIBCRYPTSETUP_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_i686-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_i686_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_i686-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_i686_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_i686-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_i686_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 build.rs:14:19:
  Bindings require at least cryptsetup-2.2.0: 
  pkg-config exited with status code 1
  > PKG_CONFIG_PATH=:/usr/lib/pkgconfig:/usr/share/pkgconfig PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 pkg-config --libs --cflags libcryptsetup 'libcryptsetup >= 2.2.0'
  The system library `libcryptsetup` required by crate `libcryptsetup-rs-sys` was not found.
  The file `libcryptsetup.pc` needs to be installed and the PKG_CONFIG_PATH environment variable must contain its parent directory.
  PKG_CONFIG_PATH contains the following:
      - 
      - /usr/lib/pkgconfig
      - /usr/share/pkgconfig
  HINT: you may need to install a package such as libcryptsetup, libcryptsetup-dev or libcryptsetup-devel.
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
RPM build errors:
error: Bad exit status from /var/tmp/rpm-tmp.JgVGFX (%build)
    Bad exit status from /var/tmp/rpm-tmp.JgVGFX (%build)
Child return code was: 1
EXCEPTION: [Error('Command failed: \n # /usr/bin/systemd-nspawn -q -M 4ca34c5badd44998b075124d79c3dc05 -D /var/lib/mock/f43-build-58908172-6569188/root -a -u mockbuild --capability=cap_ipc_lock --bind=/tmp/mock-resolv.xr_sewzh:/etc/resolv.conf --bind=/dev/btrfs-control --bind=/dev/mapper/control --bind=/dev/fuse --bind=/dev/loop-control --bind=/dev/loop0 --bind=/dev/loop1 --bind=/dev/loop2 --bind=/dev/loop3 --bind=/dev/loop4 --bind=/dev/loop5 --bind=/dev/loop6 --bind=/dev/loop7 --bind=/dev/loop8 --bind=/dev/loop9 --bind=/dev/loop10 --bind=/dev/loop11 --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin \'--setenv=PROMPT_COMMAND=printf "\\033]0;<mock-chroot>\\007"\' \'--setenv=PS1=<mock-chroot> \\s-\\v\\$ \' --setenv=LANG=C.UTF-8 --resolv-conf=off bash --login -c \'/usr/bin/rpmbuild -ba --noprep --noclean --target i686 /builddir/build/SPECS/rust-libcryptsetup-rs-sys.spec\'\n', 1)]
Traceback (most recent call last):
  File "/usr/lib/python3.13/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.13/site-packages/mockbuild/util.py", line 610, in do_with_status
    raise exception.Error("Command failed: \n # %s\n%s" % (cmd_pretty(command, env), output), child.returncode)
mockbuild.exception.Error: Command failed: 
 # /usr/bin/systemd-nspawn -q -M 4ca34c5badd44998b075124d79c3dc05 -D /var/lib/mock/f43-build-58908172-6569188/root -a -u mockbuild --capability=cap_ipc_lock --bind=/tmp/mock-resolv.xr_sewzh:/etc/resolv.conf --bind=/dev/btrfs-control --bind=/dev/mapper/control --bind=/dev/fuse --bind=/dev/loop-control --bind=/dev/loop0 --bind=/dev/loop1 --bind=/dev/loop2 --bind=/dev/loop3 --bind=/dev/loop4 --bind=/dev/loop5 --bind=/dev/loop6 --bind=/dev/loop7 --bind=/dev/loop8 --bind=/dev/loop9 --bind=/dev/loop10 --bind=/dev/loop11 --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin '--setenv=PROMPT_COMMAND=printf "\033]0;<mock-chroot>\007"' '--setenv=PS1=<mock-chroot> \s-\v\$ ' --setenv=LANG=C.UTF-8 --resolv-conf=off bash --login -c '/usr/bin/rpmbuild -ba --noprep --noclean --target i686 /builddir/build/SPECS/rust-libcryptsetup-rs-sys.spec'


Answer: Shows the build failure.