Mit cygcheck können Sie die Datenbank für die Suche nach Cywgin abfragen. Das ist auch im Web unter http://cygwin.com/packages/
$cygcheck -p cygnettle-4.dll Found 5 matches for cygnettle-4.dll cygwin32-nettle-2.7-1 - cygwin32-nettle: libnettle/libhogweed for Cygwin 32bit toolchain (installed binaries and support files) libnettle4-2.7-1 - libnettle4: A cryptographic library that is designed to fit easily in more or less any context (libnettle runtime) (installed binaries and support files) libnettle4-2.7-2 - libnettle4: A cryptographic library that is designed to fit easily in more or less any context (libnettle runtime) (installed binaries and support files) nettle-debuginfo-2.7-1 - nettle-debuginfo: Debug info for nettle (installed binaries and support files) nettle-debuginfo-2.7-2 - nettle-debuginfo: Debug info for nettle (installed binaries and support files) exluding debuginfo and cygwinXX cross library the missing package is libnettle4