diff --git a/profiles/arch/hppa/package.use.stable.mask b/profiles/arch/hppa/package.use.stable.mask
index 0c4f80d3fbd6b..f807a89399365 100644
--- a/profiles/arch/hppa/package.use.stable.mask
+++ b/profiles/arch/hppa/package.use.stable.mask
@@ -17,6 +17,10 @@
 
 #--- END OF EXAMPLES ---
 
+# Sam James <sam@gentoo.org> (2024-07-31)
+# Qt 6 not stable here.
+dev-build/cmake gui
+
 # Andrew Ammerlaan <andrewammerlaan@gentoo.org> (2024-07-25)
 # Moved to stable.mask, issue is fixed in unstable v40
 # Sam James <sam@gentoo.org> (2024-06-19)
diff --git a/profiles/arch/sparc/package.use.stable.mask b/profiles/arch/sparc/package.use.stable.mask
index 2c3aef317e177..3a1db38459896 100644
--- a/profiles/arch/sparc/package.use.stable.mask
+++ b/profiles/arch/sparc/package.use.stable.mask
@@ -1,6 +1,10 @@
 # Copyright 2019-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
+# Sam James <sam@gentoo.org> (2024-07-31)
+# Qt 6 not stable here.
+dev-build/cmake gui
+
 # Eli Schwartz <eschwartz93@gmail.com> (2024-02-05)
 # app-text/mupdf is not stable. bug #923811
 net-print/cups-filters pdf