diff --git a/kernel.spec b/kernel.spec
index 09d8c81..a5c6734 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -21,7 +21,7 @@
 
 # Don't parametrize this, it's a check to avoid build a kernel without having
 # edited the obsoletes needed for multiple kernel support
-%define KERNEL_OBSOLETES_ARE_FOR_VERSION 4.4.23
+%define KERNEL_OBSOLETES_ARE_FOR_VERSION 4.4.27
 
 #% define kernel_longterm 1
 %define kernel_MAJver %(echo %version | cut -d. -f1)
@@ -87,7 +87,7 @@
 %define _use_internal_dependency_generator 1
 
 Name:          kernel
-Version:       4.4.23
+Version:       4.4.27
 Release:       1mamba
 Summary:       The Linux Kernel, the operating system core itself
 Group:         System/Kernel and Hardware
@@ -212,6 +212,7 @@ Obsoletes:     kernel-%{KERNEL_TARGET} < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}
@@ -231,6 +232,7 @@ Obsoletes:     kernel-%{KERNEL_TARGET}-source < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-source
@@ -241,13 +243,14 @@ This kernel sources are configured for %{TARGET_CPU} architecture and the follow
 %package %{KERNEL_TARGET}-headers
 Group:         Development/Kernel
 Summary:       Headers, scripts, configuration and Makefile for the linux kernel
-Requires:      kernel-%{KERNEL_TARGET} == %{version}-%{release}
+#Requires:      kernel-%{KERNEL_TARGET} == %{version}-%{release}
 Provides:      kernelheaders = %{version}
 ## KERNELOBSOLETES-BEGIN 3.18
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-headers
@@ -264,6 +267,7 @@ Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-headers-sanitised
@@ -281,6 +285,7 @@ Obsoletes:     kernel-%{KERNEL_TARGET}-sound < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-sound
@@ -299,6 +304,7 @@ Obsoletes:     kernel-%{KERNEL_TARGET}-wireless < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 Requires:      crda
 
@@ -316,6 +322,7 @@ Obsoletes:     kernel-%{KERNEL_TARGET}-firmware < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.15
 Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.20
+Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.23
 ## KERNELOBSOLETES-END
 Provides:      linux_firmware
 
@@ -695,11 +702,18 @@ echo "%{_prefix}/src/linux-%{kernel_ver}%{?KERNEL_TARGET}/arch/$headers_arch" >>
 #   INSTALL_HDR_PATH=%{buildroot}%{_prefix}/src/linux-%{kernel_ver}%{KERNEL_TARGET}/usr
 #% else
 ARCH=%{target_cpu} make headers_install \
-   HOSTCC=%{_target_platform}-gcc \
+   HOSTCC=%{_build}-gcc \
    CROSS_COMPILE=%{_target_platform}- \
    INSTALL_HDR_PATH=%{buildroot}%{_prefix}/src/linux-%{kernel_ver}%{KERNEL_TARGET}/usr
 #% endif
 
+# Do not package cross-platform host tools
+if [ "%{_build}" != "%{_target_platform}" ]; then
+   for f in asn1_compiler conmakehash extract-cert kallsyms sortextable; do
+      rm -f %{buildroot}/usr/src/linux-%{kernel_ver}%{?KERNEL_TARGET}/scripts/$f
+   done
+fi
+
 # from kernel 3.0.4 patch
 rm -f %{buildroot}/usr/src/linux-%{kernel_ver}%{?KERNEL_TARGET}/MAINTAINERS.orig
 
@@ -1043,6 +1057,9 @@ exit 0
 /lib/firmware/*
 
 %changelog
+* Thu Oct 27 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 4.4.27-1mamba
+- update to 4.4.27
+
 * Sun Oct 02 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 4.4.23-1mamba
 - update to 4.4.23