因此，当我尝试使用 LFS 11.1 systemd 版本安装 systemd-250 时，它抛出了错误。我能提供的不多，除了日志，以及当我在 LFS chroot 中输入“mount”命令时，它说找不到它......我正在使用 Ubuntu 20.04 CD 映像。请帮忙，我不想重新开始我的所有进度。另外，由于单独挂起，我重新启动了 ISO，然后重新安装了所有内容并设置了 $LFS 变量等等。这是日志：
The Meson build system
Version: 0.61.1
Source dir: /sources/systemd-250
Build dir: /sources/systemd-250/build
Build type: native build
Project name: systemd
Project version: 250
C compiler for the host machine: cc (gcc 11.2.0 "cc (GCC) 11.2.0")
C linker for the host machine: cc ld.bfd 2.38
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program tools/add-git-hook.sh found: YES (/sources/systemd-250/tools/add-git-hook.sh)
Program tools/check-compilation.sh found: YES (/sources/systemd-250/tools/check-compilation.sh)
Program tools/meson-build.sh found: YES (/sources/systemd-250/tools/meson-build.sh)
C++ compiler for the host machine: c++ (gcc 11.2.0 "c++ (GCC) 11.2.0")
C++ linker for the host machine: c++ ld.bfd 2.38
Compiler for C supports arguments -Wno-format-signedness: YES
Compiler for C supports arguments -Wno-missing-field-initializers: YES
Compiler for C supports arguments -Wno-unused-parameter: YES
Compiler for C supports arguments -Wdate-time: YES
Compiler for C supports arguments -Wendif-labels: YES
Compiler for C supports arguments -Werror=format=2: YES
Compiler for C supports arguments -Werror=implicit-function-declaration: YES
Compiler for C supports arguments -Werror=incompatible-pointer-types: YES
Compiler for C supports arguments -Werror=int-conversion: YES
Compiler for C supports arguments -Werror=overflow: YES
Compiler for C supports arguments -Werror=override-init: YES
Compiler for C supports arguments -Werror=return-type: YES
Compiler for C supports arguments -Werror=shift-count-overflow: YES
Compiler for C supports arguments -Werror=shift-overflow=2: YES
Compiler for C supports arguments -Werror=undef: YES
Compiler for C supports arguments -Wfloat-equal: YES
Compiler for C supports arguments -Wimplicit-fallthrough=5: YES
Compiler for C supports arguments -Winit-self: YES
Compiler for C supports arguments -Wlogical-op: YES
Compiler for C supports arguments -Wmissing-include-dirs: YES
Compiler for C supports arguments -Wmissing-noreturn: YES
Compiler for C supports arguments -Wnested-externs: YES
Compiler for C supports arguments -Wold-style-definition: YES
Compiler for C supports arguments -Wpointer-arith: YES
Compiler for C supports arguments -Wredundant-decls: YES
Compiler for C supports arguments -Wshadow: YES
Compiler for C supports arguments -Wstrict-aliasing=2: YES
Compiler for C supports arguments -Wstrict-prototypes: YES
Compiler for C supports arguments -Wsuggest-attribute=noreturn: YES
Compiler for C supports arguments -Wunused-function: YES
Compiler for C supports arguments -Wwrite-strings: YES
Compiler for C supports arguments -Wno-error=#warnings: NO
Compiler for C supports arguments -Wno-string-plus-int: NO
Compiler for C supports arguments -Wno-maybe-uninitialized: YES
Compiler for C supports arguments -Wno-unused-result: YES
Compiler for C supports arguments -Werror=missing-declarations: YES
Compiler for C supports arguments -Werror=missing-prototypes: YES
Compiler for C supports arguments -fdiagnostics-show-option: YES
Compiler for C supports arguments -fno-common: YES
Compiler for C supports arguments -fno-strict-aliasing: YES
Compiler for C supports arguments -fstack-protector: YES
Compiler for C supports arguments -fstack-protector-strong: YES
Compiler for C supports arguments -fvisibility=hidden: YES
Compiler for C supports arguments --param=ssp-buffer-size=4: YES
Compiler for C supports arguments -ffunction-sections: YES
Compiler for C supports arguments -fdata-sections: YES
Compiler for C supports link arguments -Wl,--fatal-warnings: YES
Compiler for C supports link arguments -Wl,-z,now: YES
Compiler for C supports link arguments -Wl,-z,relro: YES
Compiler for C supports link arguments -fstack-protector: YES
Compiler for C supports link arguments -Wl,--warn-common: YES
Compiler for C supports link arguments -Wl,--gc-sections: YES
Compiler for C supports arguments -Wzero-length-bounds: YES
Checking if "-Werror=shadow with local shadowing" : compiles: YES
Compiler for C++ supports arguments -Wno-format-signedness: YES
Compiler for C++ supports arguments -Wno-missing-field-initializers: YES
Compiler for C++ supports arguments -Wno-unused-parameter: YES
Compiler for C supports arguments -Wstringop-truncation: YES
Checking for size of "dev_t" : 8
Checking for size of "ino_t" : 8
Checking for size of "time_t" : 8
Checking for size of "rlim_t" : 8
Checking for size of "typeof(((struct timex *)0)->freq)" : 8
Checking for size of "char16_t" : 2
Checking for size of "char32_t" : 4
Checking for size of "struct mount_attr" : 32
Checking for size of "struct statx" : 256
Checking for function "secure_getenv" : YES
Checking for function "__secure_getenv" : NO
Checking for function "memfd_create" : YES
Checking for function "gettid" : YES
Checking for function "pivot_root" : NO
Checking for function "ioprio_get" : NO
Checking for function "ioprio_set" : NO
Checking for function "name_to_handle_at" : YES
Checking for function "setns" : YES
Checking for function "renameat2" : YES
Checking for function "kcmp" : NO
Checking for function "keyctl" : NO
Checking for function "copy_file_range" : YES
Checking for function "bpf" : NO
Checking for function "statx" : YES
Checking for function "explicit_bzero" : YES
Checking for function "reallocarray" : YES
Checking for function "set_mempolicy" : NO
Checking for function "get_mempolicy" : NO
Checking for function "pidfd_send_signal" : NO
Checking for function "pidfd_open" : NO
Checking for function "rt_sigqueueinfo" : NO
Checking for function "mallinfo" : YES
Checking for function "mallinfo2" : YES
Checking for function "execveat" : YES
Checking for function "close_range" : YES
Checking for function "epoll_pwait2" : YES
Checking for function "mount_setattr" : NO
Checking for function "move_mount" : NO
Checking for function "open_tree" : NO
Checking for function "getdents64" : YES
Checking for function "getrandom" : YES
Program sh found: YES (/usr/bin/sh)
Program echo found: YES (/usr/bin/echo)
Program sed found: YES (/usr/bin/sed)
Program awk found: YES (/usr/bin/awk)
Program stat found: YES (/usr/bin/stat)
Program ln found: YES (/usr/bin/ln)
Program git found: NO
Program env found: YES (/usr/bin/env)
Program perl found: YES (/usr/bin/perl)
Program rsync found: NO
Program test/test-efi-create-disk.sh found: YES (/sources/systemd-250/test/test-efi-create-disk.sh)
Program quotaon /usr/sbin/quotaon /sbin/quotaon found: NO
Program quotacheck /usr/sbin/quotacheck /sbin/quotacheck found: NO
Program kmod found: YES (/usr/bin/kmod)
Program kexec /usr/sbin/kexec /sbin/kexec found: NO
Program sulogin /usr/sbin/sulogin /sbin/sulogin found: NO
Program mount /usr/sbin/mount /sbin/mount found: NO
Program umount /usr/sbin/umount /sbin/umount found: NO
Program loadkeys found: YES (/usr/bin/loadkeys)
Program setfont found: YES (/usr/bin/setfont)
Program nologin found: YES (/usr/sbin/nologin)
Program gperf found: YES (/usr/bin/gperf)
Message: gperf len type is size_t
Has header "sys/capability.h" : YES
Has header "crypt.h" : YES
Has header "linux/memfd.h" : YES
Has header "linux/vm_sockets.h" : YES
Has header "sys/auxv.h" : YES
Has header "valgrind/memcheck.h" : NO
Has header "valgrind/valgrind.h" : NO
Has header "linux/time_types.h" : YES
Has header "sys/sdt.h" : NO
../meson.build:824: WARNING:
The local user with the configured user name "nobody" of the nobody user does not have UID 65534 (it has 99).
Your build will result in an user table setup that is incompatible with the local system.
../meson.build:843: WARNING:
The local group with the configured group name "nobody" of the nobody group does not have GID 65534 (it has 99).
Your build will result in an group table setup that is incompatible with the local system.
Program tools/choose-default-locale.sh found: YES (/sources/systemd-250/tools/choose-default-locale.sh)
Run-time dependency threads found: YES
Library rt found: YES
Library m found: YES
Library dl found: YES
Library crypt found: YES
Checking for function "crypt_ra" with dependency -lcrypt: NO
Checking for function "crypt_preferred_method" with dependency -lcrypt: NO
Checking for function "crypt_gensalt_ra" with dependency -lcrypt: NO
Found pkg-config: /usr/bin/pkg-config (0.29.2)
Run-time dependency libcap found: YES 2.63
Did not find CMake 'cmake'
Found CMake: NO
Run-time dependency libbpf found: NO (tried pkgconfig and cmake)
Program clang found: NO
Program llvm-strip found: NO
Program bpftool /usr/sbin/bpftool found: NO
Run-time dependency mount found: NO (tried pkgconfig)
../meson.build:1021:0: ERROR: Dependency "mount" not found, tried pkgconfig
A full log can be found at /sources/systemd-250/build/meson-logs/meson-log.txt