qt6-base/qt6-xcb-private-headers-6.6.2-4-x86_64.pkg.tar.zst build reproducible in our test framework:
8576c2974e813275616875064f2a594c18227b666694b549ca8173eb6890eb8f qt6-xcb-private-headers-6.6.2-4-x86_64.pkg.tar.zst
c5769ad74c5e7face36947df6ee628eefd1beb9dfe8930ca585dddc6bfe406c2 qt6-xcb-private-headers-6.6.2-4-x86_64.pkg.tar.zst-b1.BUILDINFO.txt
c5769ad74c5e7face36947df6ee628eefd1beb9dfe8930ca585dddc6bfe406c2 qt6-xcb-private-headers-6.6.2-4-x86_64.pkg.tar.zst-b2.BUILDINFO.txt