diff --git a/PKGBUILD b/PKGBUILD
index 250711a..528dc7c 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -41,8 +41,6 @@ validpgpkeys=(
              )
 
 _kernelname=${pkgbase#linux}
-_KARCH=x86
-
 
 prepare() {
   cd "${srcdir}/${_srcname}"
@@ -120,6 +118,8 @@ _package() {
 
   cd "${srcdir}/${_srcname}"
 
+  KARCH=x86
+
   # get kernel version
   _kernver="$(make LOCALVERSION= kernelrelease)"
   _basekernel=${_kernver%%-*}
@@ -127,7 +127,7 @@ _package() {
 
   mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot}
   make LOCALVERSION= INSTALL_MOD_PATH="${pkgdir}" modules_install
-  cp arch/$_KARCH/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgbase}"
+  cp arch/$KARCH/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgbase}"
 
   # set correct depmod command for install
   cp -f "${startdir}/${install}" "${startdir}/${install}.pkg"
@@ -202,15 +202,15 @@ _package-headers() {
   chmod og-w -R "${pkgdir}/usr/lib/modules/${_kernver}/build/scripts"
   mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/.tmp_versions"
 
-  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${_KARCH}/kernel"
+  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/kernel"
 
-  cp arch/${_KARCH}/Makefile "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${_KARCH}/"
+  cp arch/${KARCH}/Makefile "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/"
 
   if [ "${CARCH}" = "i686" ]; then
-    cp arch/${_KARCH}/Makefile_32.cpu "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${_KARCH}/"
+    cp arch/${KARCH}/Makefile_32.cpu "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/"
   fi
 
-  cp arch/${_KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${_KARCH}/kernel/"
+  cp arch/${KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/kernel/"
 
   # add docbook makefile
   install -D -m644 Documentation/DocBook/Makefile \