diff --git a/dev-qt/qttools/qttools-6.9.9999.ebuild b/dev-qt/qttools/qttools-6.9.9999.ebuild
index ebf1142f7f028..74e7e707f7743 100644
--- a/dev-qt/qttools/qttools-6.9.9999.ebuild
+++ b/dev-qt/qttools/qttools-6.9.9999.ebuild
@@ -62,6 +62,13 @@ DEPEND="
 	)
 "
 
+src_prepare() {
+	qt6-build_src_prepare
+
+	# qttools is picky about clang versions and ignores LLVM_SLOT
+	sed -i '/find_package/s/${VERSION}//' cmake/FindWrapLibClang.cmake || die
+}
+
 src_configure() {
 	use clang && llvm_chost_setup
 
diff --git a/dev-qt/qttools/qttools-6.9999.ebuild b/dev-qt/qttools/qttools-6.9999.ebuild
index ebf1142f7f028..74e7e707f7743 100644
--- a/dev-qt/qttools/qttools-6.9999.ebuild
+++ b/dev-qt/qttools/qttools-6.9999.ebuild
@@ -62,6 +62,13 @@ DEPEND="
 	)
 "
 
+src_prepare() {
+	qt6-build_src_prepare
+
+	# qttools is picky about clang versions and ignores LLVM_SLOT
+	sed -i '/find_package/s/${VERSION}//' cmake/FindWrapLibClang.cmake || die
+}
+
 src_configure() {
 	use clang && llvm_chost_setup