diff --git a/sys-kernel/sim_buffalo/ChangeLog b/sys-kernel/sim_buffalo/ChangeLog
index 8002919..5ee7c16 100644
--- a/sys-kernel/sim_buffalo/ChangeLog
+++ b/sys-kernel/sim_buffalo/ChangeLog
@@ -2,6 +2,9 @@
 # Copyright 1999-2010 Gentoo Foundation; Distributed under the GPL v2
 # $Header: $
 
+  05 Oct 2010; Mario Fetka <mario.fetka@gmail.com> sim_buffalo-0.1.ebuild:
+  add check for correct configured kernel
+
   05 Oct 2010; Mario Fetka <mario.fetka@gmail.com> sim_buffalo-0.1.ebuild:
   correct build deep
 
diff --git a/sys-kernel/sim_buffalo/Manifest b/sys-kernel/sim_buffalo/Manifest
index be52aca..fd260a9 100644
--- a/sys-kernel/sim_buffalo/Manifest
+++ b/sys-kernel/sim_buffalo/Manifest
@@ -1,4 +1,4 @@
 DIST sim_buffalo-0.1.tar.gz 2217 RMD160 f75ef40ecb24ef8432464e9cdfc22d7da0b1d3e2 SHA1 3b51668b7859ed3867d2157614d2a83005a43a5e SHA256 b6b4d38a794be7e0ada95e16fe91a39151a147669def61bf1916bef499860606
-EBUILD sim_buffalo-0.1.ebuild 799 RMD160 9010be3e28dadaa30d7363865424d79deae8f364 SHA1 abcd8377b0c74141d586f77979fc2f61b8d0adca SHA256 9f5379098f3714e635db5f2180e2350cc25c9e1847e678061c468fa7f3801a31
-MISC ChangeLog 332 RMD160 bdcfcec86b896cf75bfc70494b4610957ff90bd4 SHA1 cec02627361ae9781669e9a33d29317d512053be SHA256 fe8d9f6ccd8d9d1c4ea256384967e1f9145a8a14287ef44146e1d0865f6c8f23
+EBUILD sim_buffalo-0.1.ebuild 936 RMD160 1b7cb96caf877f32461d1f2beada63bf2b954c03 SHA1 9d7cc02005057b4a8e47e88baaa2602f4665c685 SHA256 85cce2724f3f30c4aba8d692c01e19787cff570fcfd51e9b7817d52a61b40c65
+MISC ChangeLog 450 RMD160 7330f2f0a970371b6b77dd6910e7d6d974bb82d7 SHA1 5e4184b08bacd7c46c72143b2fb63033c78af7bb SHA256 d3874bd98351c8b4a97046f8849defc21eb2d90e32688f4eef1b82ec31a849c0
 MISC metadata.xml 1238 RMD160 c82938e77f387291d6a1c3bf9b0d802f2878dd12 SHA1 b5738f14922c69e78cfb867acdc65eeea25977bf SHA256 2c13f98be5fa8bdaf21ac86bcd00bbeb8944df5615de0cfce35ae4c00ef4b4d5
diff --git a/sys-kernel/sim_buffalo/sim_buffalo-0.1.ebuild b/sys-kernel/sim_buffalo/sim_buffalo-0.1.ebuild
index 28b2143..fd65f87 100644
--- a/sys-kernel/sim_buffalo/sim_buffalo-0.1.ebuild
+++ b/sys-kernel/sim_buffalo/sim_buffalo-0.1.ebuild
@@ -19,16 +19,17 @@ DEPEND=""
 
 RDEPEND="virtual/linux-sources"
 
-RESTRICT="mirror"
-
 S=${WORKDIR}/sim_buffalo
 
-MODULE_NAMES="sim_buffalo(misc:${S}:${S}/kernel)"
-BUILD_TARGETS="kernel-mod"
-BUILD_PARAMS="KSRC=${KERNEL_DIR}"
+pkg_setup() {
+	MODULE_NAMES="sim_buffalo(misc:${S}:${S}/kernel)"
+	BUILD_TARGETS="kernel-mod"
+	BUILD_PARAMS="KSRC=${KERNEL_DIR}"
 
-src_unpack() {
-	unpack ${A}
+	if ! linux_chkconfig_present GPIO_SYSFS; then
+		ewarn "You don't have GPIO_SYSFS support enabled in the kernel."
+		ewarn "The /proc/buffalo simulator wont work."
+	fi
 }
 
 src_compile() {