Derived from:

https://invent.kde.org/pim/trojita/-/commit/91087933c5e7a03a8097c0ffe5f7289abcfc123b

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -95,6 +95,7 @@
 
 trojita_find_package(Mimetic "" "http://www.codesink.org/mimetic_mime_library.html" "C++ MIME Library" "Required for client-side MIME parsing" WITH_MIMETIC)
 trojita_find_package(Gpgmepp "" "https://quickgit.kde.org/?p=gpgmepp.git" "C++ bindings for gpgme" "Needed for encrypted/signed e-mails" WITH_GPGMEPP)
+trojita_find_package(QGpgme "1.8.0" "https://gnupg.org/related_software/gpgme/index.html" "Qt bindings for gpgme" "Needed for encrypted/signed e-mails" WITH_GPGMEPP)
 trojita_option(WITH_CRYPTO_MESSAGES "Enable support for encrypted messages" AUTO "WITH_MIMETIC;WITH_GPGMEPP")
 
 if(WIN32)