diff --git a/srcpkgs/linux5.13/template b/srcpkgs/linux5.13/template
index be7bd8b88df..43a3f6aa16a 100644
--- a/srcpkgs/linux5.13/template
+++ b/srcpkgs/linux5.13/template
@@ -1,6 +1,6 @@
 # Template file for 'linux5.13'
 pkgname=linux5.13
-version=5.13.6
+version=5.13.8
 revision=1
 wrksrc="linux-${version%.*}"
 short_desc="Linux kernel and modules (${version%.*} series)"
@@ -10,7 +10,7 @@ homepage="https://www.kernel.org"
 distfiles="https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-${version%.*}.tar.xz
  https://cdn.kernel.org/pub/linux/kernel/v5.x/patch-${version}.xz"
 checksum="3f6baa97f37518439f51df2e4f3d65a822ca5ff016aa8e60d2cc53b95a6c89d9
- e83b798bfe22bc9d5e8115cd2bbff24cdf5fd0de1b423a3342985445b02668a8"
+ dfbaaf312cd69021fbe8ab597460aa961b8d2944efca35caa26b36fce43e616d"
 skip_extraction="patch-${version}.xz"
 python_version=3
 
@@ -44,7 +44,7 @@ mutable_files="
  /usr/lib/modules/${_kernver}/modules.devname"
 
 # reproducible build
-export KBUILD_BUILD_TIMESTAMP=${SOURCE_DATE_EPOCH:-0}
+export KBUILD_BUILD_TIMESTAMP=$(LC_ALL=C date -ud @${SOURCE_DATE_EPOCH:-0})
 export KBUILD_BUILD_USER=voidlinux
 export KBUILD_BUILD_HOST=voidlinux