CygWin doesn't recognize Package Manager (?)

I have installed WinZip and 7Zip, but still the problem occurs

It says...

Now attempting installation... 
Looking for a previous installation of SDKMAN... 
Looking for unzip... 
Not found. 
====================================================================================================== 
Please install unzip on your system using your favourite package manager. 

Restart after installing unzip. 
======================================================================================================

Solution 1:

The message is very clear

Please install unzip on your system

In which Cygwin package is unzip ?

$ cygcheck -p bin/unzip
Found 13 matches for bin/unzip
busybox-1.23.2-1 - busybox: Tiny utilities in a single executable (installed binaries and support files)
...
unzip-6.0-15 - unzip: Info-ZIP decompression utility (installed binaries and support files)
unzip-6.0-16 - unzip: Info-ZIP decompression utility
unzip-6.0-17 - unzip: Info-ZIP decompression utility
...
zziplib-0.13.67-1 - zziplib: ZIP file utilities
zziplib-0.13.68-1 - zziplib: ZIP file utilities
zziplib-0.13.71-1 - zziplib: ZIP file utilities

I would say unzip is the likely candidate. After installing unzip with Cygwin setup you will have

$ cygcheck -l unzip
/usr/bin/funzip.exe
/usr/bin/unzip.exe
/usr/bin/unzipsfx.exe
/usr/bin/zipgrep
/usr/bin/zipinfo
/usr/share/...

$ unzip --help
UnZip 6.00 of 20 April 2009, by Info-ZIP.  Maintained by C. Spieler.  Send
bug reports using http://www.info-zip.org/zip-bug.html; see README for details.
....