These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] app-text/qpdf-12.4.2:0/12.1::gentoo  USE="-doc -examples -gnutls -test -verify-sig -zopfli" 19263 KiB

Total: 1 package (1 new), Size of downloads: 19263 KiB