--- calibre-5.16.1.ebuild	2021-06-15 09:55:01.962385579 -0700
+++ calibre-5.21.0.ebuild	2021-06-17 18:48:24.457532898 -0700
@@ -71,3 +71,3 @@
 		>=dev-python/python-dateutil-2.5.3[${PYTHON_MULTI_USEDEP}]
-		>=dev-python/PyQt5-5.12[gui,svg,widgets,network,printsupport,${PYTHON_MULTI_USEDEP}]
+		>=dev-python/PyQt5-5.15.4-r1[gui,svg,widgets,network,printsupport,${PYTHON_MULTI_USEDEP}]
 		>=dev-python/PyQtWebEngine-5.12[${PYTHON_MULTI_USEDEP}]
@@ -106,4 +106,5 @@
 	$(python_gen_cond_dep '
+		dev-python/PyQt-builder[${PYTHON_MULTI_USEDEP}]
 		>=dev-python/setuptools-23.1.0[${PYTHON_MULTI_USEDEP}]
-		<dev-python/sip-5[${PYTHON_MULTI_USEDEP}]
+		>=dev-python/sip-5[${PYTHON_MULTI_USEDEP}]
 	')
@@ -127,7 +128,2 @@
 
-	if ! has_version ">=dev-python/sip-5"; then
-		einfo "Applying SIP v4 patch because SIP v5 was not detected"
-		eapply "${WORKDIR}/${PN}-5.16.0-SIP-v4.patch"
-	fi
-
 	eapply_user