diff --git a/pkgs/development/libraries/libgcrypt/default.nix b/pkgs/development/libraries/libgcrypt/default.nix
index ed267e23c87b..b47709940dd5 100644
--- a/pkgs/development/libraries/libgcrypt/default.nix
+++ b/pkgs/development/libraries/libgcrypt/default.nix
@@ -18,6 +18,8 @@ stdenv.mkDerivation (rec {
     make check
   '';
 
+  patches = [ ./no-build-timestamp.patch ];
+
   meta = {
     description = "General-pupose cryptographic library";
 
diff --git a/pkgs/development/libraries/libgcrypt/no-build-timestamp.patch b/pkgs/development/libraries/libgcrypt/no-build-timestamp.patch
new file mode 100644
index 000000000000..6ae708f059d7
--- /dev/null
+++ b/pkgs/development/libraries/libgcrypt/no-build-timestamp.patch
@@ -0,0 +1,12 @@
+diff -ur libgcrypt-1.5.3.orig/configure libgcrypt-1.5.3/configure
+--- libgcrypt-1.5.3.orig/configure	2013-07-25 11:22:47.000000000 +0200
++++ libgcrypt-1.5.3/configure	2014-04-09 00:17:58.659147199 +0200
+@@ -16520,6 +16520,7 @@
+ 
+ 
+ BUILD_TIMESTAMP=`date -u +%Y-%m-%dT%H:%M+0000 2>/dev/null || date`
++BUILD_TIMESTAMP=1970-01-01T00:00+0000
+ 
+ 
+ cat >>confdefs.h <<_ACEOF
+Only in libgcrypt-1.5.3: out
diff --git a/pkgs/development/libraries/libgpg-error/default.nix b/pkgs/development/libraries/libgpg-error/default.nix
index 663bd944fb92..03662571adeb 100644
--- a/pkgs/development/libraries/libgpg-error/default.nix
+++ b/pkgs/development/libraries/libgpg-error/default.nix
@@ -14,6 +14,8 @@ stdenv.mkDerivation (rec {
 
   doCheck = true;
 
+  patches = [ ./no-build-timestamp.patch ];
+
   meta = {
     description = "Libgpg-error, a small library that defines common error values for all GnuPG components";
 
diff --git a/pkgs/development/libraries/libgpg-error/no-build-timestamp.patch b/pkgs/development/libraries/libgpg-error/no-build-timestamp.patch
new file mode 100644
index 000000000000..c8350a278ec4
--- /dev/null
+++ b/pkgs/development/libraries/libgpg-error/no-build-timestamp.patch
@@ -0,0 +1,11 @@
+diff -ur libgpg-error-1.12.orig/configure libgpg-error-1.12/configure
+--- libgpg-error-1.12.orig/configure	2013-06-24 06:42:28.000000000 +0200
++++ libgpg-error-1.12/configure	2014-04-09 00:12:47.867856520 +0200
+@@ -14585,6 +14585,7 @@
+ 
+ 
+ BUILD_TIMESTAMP=`date -u +%Y-%m-%dT%H:%M+0000 2>/dev/null || date`
++BUILD_TIMESTAMP=1970-01-01T00:00+0000
+ 
+ 
+ cat >>confdefs.h <<_ACEOF
diff --git a/pkgs/os-specific/linux/busybox/default.nix b/pkgs/os-specific/linux/busybox/default.nix
index 98fedb2d3f4f..34eb19380d4a 100644
--- a/pkgs/os-specific/linux/busybox/default.nix
+++ b/pkgs/os-specific/linux/busybox/default.nix
@@ -49,6 +49,7 @@ stdenv.mkDerivation rec {
   };
 
   configurePhase = ''
+    export KCONFIG_NOTIMESTAMP=1
     make defconfig
     ${configParser}
     cat << EOF | parseconfig