diff --git a/321.bash.vars b/321.bash.vars
index 9f1737e..9cd822b 100644
--- a/321.bash.vars
+++ b/321.bash.vars
@@ -2,6 +2,7 @@
 # . ./build.vars and set -o errexit -o noglob are assumed.
 #
 
+PKG_BASH_PATCHES_EXTRA_URL="https://ftp.gnu.org/gnu/bash/bash-${PKG_BASH_VERSION}-patches/";
 PKG_BASH_PATCHES_EXTRA_MANIFEST="
 bash43-001 ecb3dff2648667513e31554b3ad054ccd89fce38e33367c9459ac3a285153742
 bash43-002 eee7cd7062ab29a9e4f02924d9c367264dcb8b162703f74ff6eb8f175a91502b
@@ -46,4 +47,20 @@ bash43-040 84bb396b9262992ca5424feab6ed3ec39f193ef5c76dfe4a62b551bd8dd9d76b
 bash43-041 4ec432966e4198524a7e0cd685fe222e96043769c9613e66742ac475db132c1a
 bash43-042 ac219322db2791da87a496ee6e8e5544846494bdaaea2626270c2f73c1044919";
 
+pkg_bash_patch_post() {
+	rm_if_exists -m -c ${PKG_SUBDIR}-patches-extra;
+	wget -c -nd -np -r -R \*.htm\* -R \*.sig ${PKG_BASH_PATCHES_EXTRA_URL};
+	for __pbpp_patch_fname in		\
+			$(find . -type f -not -iname \*.sig | sort); do
+		patch -b -d ../${PKG_SUBDIR} -p0 < ${__pbpp_patch_fname};
+	done; unset __pbpp_patch_fname;
+	echo ${PKG_BASH_PATCHES_EXTRA_MANIFEST} | while read __pbpp_manifest_line; do
+		set -- ${__pbpp_manifest_line};
+		if ! compare_hash ${1} ${2}; then
+			log_msg failexit "Error: hash mismatch for patch file \`${1}'.";
+		fi;
+	done;
+	cd ${OLDPWD};
+};
+
 # vim:filetype=sh
diff --git a/build.vars b/build.vars
index d1b36ec..d2f2ea5 100644
--- a/build.vars
+++ b/build.vars
@@ -64,7 +64,7 @@ export PATH="${PREFIX}/bin${PATH:+:${PATH}}";
 # pkg.build
 #
 DEFAULT_MAKEFLAGS_BUILD=-j8;
-PKG_BUILD_VARS="BUILD_CMDLINE BUILD_DIR BUILD_TYPE CFLAGS_BUILD_EXTRA CFLAGS_CONFIGURE CFLAGS_CONFIGURE_EXTRA CFLAGS_INSTALL_EXTRA CONFIG_CACHE_EXTRA CONFIGURE_ARGS CONFIGURE_ARGS_EXTRA ENV_VARS_EXTRA FNAME GIT_ARGS_EXTRA INSTALL_FILES INSTALL_TARGET LDFLAGS_BUILD_EXTRA LDFLAGS_CONFIGURE LDFLAGS_CONFIGURE_EXTRA LDFLAGS_INSTALL_EXTRA MAKEFLAGS_BUILD MAKEFLAGS_BUILD_EXTRA MAKEFLAGS_INSTALL MAKEFLAGS_INSTALL_EXTRA NO_CLEAN NO_MAKE_INSTALL PATCHES_EXTRA_URL PREFIX_EXTRA SHA256SUM SLIBTOOL SUBDIR SUBDIR_CREATE URL URL_FNAME URL_TYPE VERSION";
+PKG_BUILD_VARS="BUILD_CMDLINE BUILD_DIR BUILD_TYPE CFLAGS_BUILD_EXTRA CFLAGS_CONFIGURE CFLAGS_CONFIGURE_EXTRA CFLAGS_INSTALL_EXTRA CONFIG_CACHE_EXTRA CONFIGURE_ARGS CONFIGURE_ARGS_EXTRA ENV_VARS_EXTRA FNAME GIT_ARGS_EXTRA INSTALL_FILES INSTALL_TARGET LDFLAGS_BUILD_EXTRA LDFLAGS_CONFIGURE LDFLAGS_CONFIGURE_EXTRA LDFLAGS_INSTALL_EXTRA MAKEFLAGS_BUILD MAKEFLAGS_BUILD_EXTRA MAKEFLAGS_INSTALL MAKEFLAGS_INSTALL_EXTRA NO_CLEAN NO_MAKE_INSTALL PREFIX_EXTRA SHA256SUM SLIBTOOL SUBDIR SUBDIR_CREATE URL URL_FNAME URL_TYPE VERSION";
 PKG_LVL0_PREFIX="${PREFIX_CROSS}";
 PKG_LVL0_BUILD_TYPE="host";
 PKG_LVL0_CONFIGURE_ARGS="-C --disable-nls --host=${TARGET} --prefix= --target=${TARGET}";
@@ -262,7 +262,6 @@ PKG_LVL3_MAKEFLAGS_INSTALL="DESTDIR=${PREFIX_NATIVE}";
 : ${PKG_BASH_SHA256SUM:=afc687a28e0e24dc21b988fa159ff9dbcf6b7caa92ade8645cc6d5605cd024d4};
 : ${PKG_BASH_URL:=https://ftp.gnu.org/gnu/bash/bash-${PKG_BASH_VERSION}.tar.gz};
 : ${PKG_BASH_CONFIGURE_ARGS_EXTRA:="--enable-static-link --without-bash-malloc --with-curses"};
-: ${PKG_BASH_PATCHES_EXTRA_URL:=https://ftp.gnu.org/gnu/bash/bash-${PKG_BASH_VERSION}-patches/};
 : ${PKG_COREUTILS_VERSION:=8.23};
 : ${PKG_COREUTILS_SHA256SUM:=ec43ca5bcfc62242accb46b7f121f6b684ee21ecd7d075059bf650ff9e37b82d};
 : ${PKG_COREUTILS_URL:=https://ftp.gnu.org/gnu/coreutils/coreutils-${PKG_COREUTILS_VERSION}.tar.xz};
diff --git a/pkg.build b/pkg.build
index e937614..1f828de 100644
--- a/pkg.build
+++ b/pkg.build
@@ -91,21 +91,8 @@ if ! is_build_script_done patch; then
 			patch -b -d ${PKG_SUBDIR} -p1 < ${__patch_fname};
 		fi;
 	done; unset __patch_fname;
-	if [ -n "${PKG_PATCHES_EXTRA_URL}" ]; then
-		(rm_if_exists -m -c ${PKG_SUBDIR}-patches-extra;
-		wget -c -nd -np -r -R \*.htm\* -R \*.sig ${PKG_PATCHES_EXTRA_URL};
-		for __patch_fname in		\
-				$(find . -type f -not -iname \*.sig | sort); do
-			patch -b -d ../${PKG_SUBDIR} -p0 < ${__patch_fname};
-		done);
-		if [ -n "${PKG_PATCHES_EXTRA_MANIFEST}" ]; then
-			(set -- ${PKG_PATCHES_EXTRA_MANIFEST};
-			while [ ${#} -gt 0 ]; do
-				if ! compare_hash ${1} ${2}; then
-					log_msg failexit "Error: hash mismatch for patch file \`${1}'.";
-				fi; shift;
-			done);
-		fi;
+	if test_cmd pkg_${PKG_NAME}_patch_post; then
+		pkg_${PKG_NAME}_patch_post;
 	fi;
 	set_build_script_done patch -configure;
 fi;
@@ -230,7 +217,7 @@ if ! is_build_script_done install; then
 			echo mkdir -p -- ${PKG_PREFIX}/${__mkdir_fname};
 			mkdir -p -- ${PKG_PREFIX}/${__mkdir_fname};
 			;;
-		*)	
+		*)
 			__file_fname_src="${1%=*}";
 			__file_fname_dst="${1#*=}";
 			echo cp -pP -- ${__file_fname_src} ${PKG_PREFIX}/${__file_fname_dst};