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: 
Start: installing minimal buildroot with dnf
execv(/usr/bin/dnf-3) failed: No such file or directory
WARNING: DNF command failed, retrying, attempt #2, sleeping 10s
execv(/usr/bin/dnf-3) failed: No such file or directory
WARNING: DNF command failed, retrying, attempt #3, sleeping 10s
execv(/usr/bin/dnf-3) failed: No such file or directory
ERROR: Exception(/var/lib/copr-rpmbuild/workspace/workdir-hbejbezy/podman/podman.spec) Config(fedora-eln-x86_64) 0 minutes 28 seconds
INFO: Results and/or logs in: /var/lib/copr-rpmbuild/results
INFO: Cleaning up build root ('cleanup_on_failure=True')
Start: clean chroot
INFO: unmounting tmpfs.
Finish: clean chroot
ERROR: Command failed: 
 # /usr/bin/systemd-nspawn -q -M b69abec0d8344b1bb43241e024e31b9b -D /var/lib/mock/fedora-eln-x86_64-bootstrap-1715332529.126011/root -a --capability=cap_ipc_lock --rlimit=RLIMIT_NOFILE=10240 --capability=cap_ipc_lock --bind=/tmp/mock-resolv.1ulmbs34:/etc/resolv.conf --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/var/lib/mock/fedora-eln-x86_64-1715332529.126011/root/installation-homedir --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 --setenv=LC_MESSAGES=C.UTF-8 --setenv=SYSTEMD_NSPAWN_TMPFS_TMP=0 --setenv=SYSTEMD_SECCOMP=0 --resolv-conf=off /usr/bin/dnf-3 --installroot /var/lib/mock/fedora-eln-x86_64-1715332529.126011/root/ --releasever eln --setopt=deltarpm=False --setopt=allow_vendor_change=yes --allowerasing --disableplugin=local --disableplugin=spacewalk --disableplugin=versionlock install bash bzip2 coreutils cpio diffutils fedora-release-eln findutils gawk glibc-minimal-langpack grep gzip info patch redhat-rpm-config rpm-build sed tar unzip util-linux which xz --setopt=tsflags=nocontexts --setopt=tsflags=nocontexts --setopt=tsflags=nocontexts
execv(/usr/bin/dnf-3) failed: No such file or directory
```
Start: installing minimal buildroot with dnf
execv(/usr/bin/dnf-3) failed: No such file or directory
WARNING: DNF command failed, retrying, attempt #2, sleeping 10s
execv(/usr/bin/dnf-3) failed: No such file or directory
WARNING: DNF command failed, retrying, attempt #3, sleeping 10s
execv(/usr/bin/dnf-3) failed: No such file or directory
ERROR: Exception(/var/lib/copr-rpmbuild/workspace/workdir-hbejbezy/podman/podman.spec) Config(fedora-eln-x86_64) 0 minutes 28 seconds
INFO: Results and/or logs in: /var/lib/copr-rpmbuild/results
INFO: Cleaning up build root ('cleanup_on_failure=True')
Start: clean chroot
INFO: unmounting tmpfs.
Finish: clean chroot
ERROR: Command failed: 
 # /usr/bin/systemd-nspawn -q -M b69abec0d8344b1bb43241e024e31b9b -D /var/lib/mock/fedora-eln-x86_64-bootstrap-1715332529.126011/root -a --capability=cap_ipc_lock --rlimit=RLIMIT_NOFILE=10240 --capability=cap_ipc_lock --bind=/tmp/mock-resolv.1ulmbs34:/etc/resolv.conf --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/var/lib/mock/fedora-eln-x86_64-1715332529.126011/root/installation-homedir --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 --setenv=LC_MESSAGES=C.UTF-8 --setenv=SYSTEMD_NSPAWN_TMPFS_TMP=0 --setenv=SYSTEMD_SECCOMP=0 --resolv-conf=off /usr/bin/dnf-3 --installroot /var/lib/mock/fedora-eln-x86_64-1715332529.126011/root/ --releasever eln --setopt=deltarpm=False --setopt=allow_vendor_change=yes --allowerasing --disableplugin=local --disableplugin=spacewalk --disableplugin=versionlock install bash bzip2 coreutils cpio diffutils fedora-release-eln findutils gawk glibc-minimal-langpack grep gzip info patch redhat-rpm-config rpm-build sed tar unzip util-linux which xz --setopt=tsflags=nocontexts --setopt=tsflags=nocontexts --setopt=tsflags=nocontexts
execv(/usr/bin/dnf-3) failed: No such file or directory
```