diff --git a/main/linux-lts/APKBUILD b/main/linux-lts/APKBUILD
index 8f5c110c9b6..abbaef8e08a 100644
--- a/main/linux-lts/APKBUILD
+++ b/main/linux-lts/APKBUILD
@@ -4,7 +4,7 @@ _flavor=lts
 pkgname=linux-$_flavor
 pkgver=6.6.36
 _kernver=${pkgver%.*}
-pkgrel=0
+pkgrel=1
 pkgdesc="Linux lts kernel"
 url="https://www.kernel.org"
 depends="initramfs-generator"
@@ -170,12 +170,17 @@ updateconfigs() {
 	done
 }
 
+set_kbuild_timestamp() {
+	# KBUILD_BUILD_TIMESTAMP needs to be parsable by busybox date
+	export KBUILD_BUILD_TIMESTAMP="$(date '+%Y-%m-%d %H:%M:%S' -u${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
+}
+
 build() {
 	unset LDFLAGS
 	# for some reason these sometimes leak into the kernel build,
 	# -Werror=format-security breaks some stuff
 	unset CFLAGS CPPFLAGS CXXFLAGS
-	export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
+	set_kbuild_timestamp
 	for i in $_flavors; do
 		_prepareconfig "$i" "$CARCH"
 	done
@@ -199,7 +204,7 @@ build() {
 
 _package() {
 	local _buildflavor="$1" _outdir="$2"
-	export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
+	set_kbuild_timestamp
 
 	cd "$srcdir"/build-$_buildflavor.$CARCH
 	local _abi_release="$(make -s kernelrelease)"
@@ -285,7 +290,7 @@ _dev() {
 	pkgdesc="Headers and script for third party modules for $_flavor kernel"
 	depends="$_depends_dev"
 	local dir="$subpkgdir"/usr/src/linux-headers-"$_abi_release"
-	export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
+	set_kbuild_timestamp
 
 	# first we import config, run prepare to set up for building
 	# external modules, and create the scripts