diff --git a/steps/SHA256SUMS.pkgs b/steps/SHA256SUMS.pkgs
index a1e6218b..059e7380 100644
--- a/steps/SHA256SUMS.pkgs
+++ b/steps/SHA256SUMS.pkgs
@@ -70,7 +70,7 @@ b39826742e236890f3562cdf19492e7ef4224b271f3e75ddeab1f07982b03ebe  libffi-3.3_0.t
 daae709e98d2df2190d1d13b4e86f7f3fe90fa7a975282fe0bb03289b6539f29  libtool-2.2.4_0.tar.bz2
 6cefa575362149620f8008a32c8af54f0198a18bc6ab910bd3cead196c1507d7  libtool-2.4.7_0.tar.bz2
 503007bbcddcf4e49d26514c59b4c9501f8b42f0c994a59dfdc388b1ae6b7900  libunistring-0.9.10_0.tar.bz2
-e10734d700e3ab870374d3f37f6e6cb394d6ba7e2da6f4e70bb324e834b0ad7f  linux-4.9.10_0.tar.bz2
+fd2264a08cbeeb28f3e2580cba174376a154c77b0ef6cbf67b55fd13c0987f52  linux-4.9.10_0.tar.bz2
 d15c922973c15a8206e09020e8cfe6a78f7e93614de212f2b37ff80163799c6c  linux-headers-4.9.10_0.tar.bz2
 3864f2c66516fc4f5086f626f4da2b2a7635e21babca86ba478f866920868e2b  m4-1.4.7_0.tar.bz2
 e69554b0a77b419ddd5d0a0e418ba4005ecd0f6784c92a6928a0270bd929a098  make-3.82_0.tar.bz2
diff --git a/steps/improve/update_env.sh b/steps/improve/update_env.sh
index ac01afbd..70ab828d 100755
--- a/steps/improve/update_env.sh
+++ b/steps/improve/update_env.sh
@@ -16,6 +16,7 @@ SRCDIR=${SRCDIR}
 MAKEJOBS=-j${JOBS}
 export HOME=/tmp
 export SOURCE_DATE_EPOCH=0
+export KBUILD_BUILD_TIMESTAMP='@0'
 export SHELL=/usr/bin/bash
 DESTDIR=/tmp/destdir
 EOF