diff --git a/srcpkgs/linux5.10/template b/srcpkgs/linux5.10/template
index 2832c9d04ad..6242d17550e 100644
--- a/srcpkgs/linux5.10/template
+++ b/srcpkgs/linux5.10/template
@@ -1,6 +1,6 @@
 # Template file for 'linux5.10'
 pkgname=linux5.10
-version=5.10.54
+version=5.10.56
 revision=1
 wrksrc="linux-${version}"
 short_desc="Linux kernel and modules (${version%.*} series)"
@@ -8,7 +8,7 @@ maintainer="Leah Neukirchen <leah@vuxu.org>"
 license="GPL-2.0-only"
 homepage="https://www.kernel.org"
 distfiles="https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-${version}.tar.xz"
-checksum=bf50c63261847187eca4a1793e5df5c1355b21697409589f6ca03e32b629be44
+checksum=4d6a0d5f9c50fa44890e0b61e1fb63f6efe6be448ceddfe1ad7c0cbd2890ec6b
 python_version=3
 
 # XXX Restrict archs until a proper <arch>-dotconfig is available in FILESDIR.
@@ -41,7 +41,7 @@ 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