[Closed but Unresolved] Locate Device on Network?

What gives here?

root@OpenWrt:~# opkg install arp-scan
Installing arp-scan (1.9.5-1) to root...
Downloading http://downloads.lede-project.org/snapshots/packages/mips_24kc/packages/arp-scan_1.9.5-1_mips_24kc.ipk
Installing libpcap1 (1.9.0-2) to root...
Downloading http://downloads.lede-project.org/snapshots/packages/mips_24kc/base/libpcap1_1.9.0-2_mips_24kc.ipk
Collected errors:

  • check_data_file_clashes: Package libpcap1 wants to install file /usr/lib/libpcap.so.1
    But that file is already provided by package * libpcap
  • opkg_install_cmd: Cannot install package arp-scan.

I read on the net that arp-scan is available on OpenWRT around 2018. Did something change, or do I have a fault in my router's firmware?