diff --git a/metadata/categories.conf b/metadata/categories.conf
index fadbb22..d29f802 100644
--- a/metadata/categories.conf
+++ b/metadata/categories.conf
@@ -15,3 +15,4 @@ x11-apps
 app-security
 media-gfx
 sys-kernel
+cross-avr
diff --git a/packages/sys-kernel/dtc/dtc-1.4.6.exheres-0 b/packages/sys-kernel/dtc/dtc-1.4.6.exheres-0
new file mode 100644
index 0000000..c4a4ab6
--- /dev/null
+++ b/packages/sys-kernel/dtc/dtc-1.4.6.exheres-0
@@ -0,0 +1,45 @@
+# Copyright 2018 Martin Sekera <sekerama@gmail.com>
+# Distributed under the terms of the GNU General Public License v2
+
+DOWNLOADS="mirror://kernel/software/utils/${PN}/${PNV}.tar.gz"
+HOMEPAGE="https://devicetree.org/ https://git.kernel.org/cgit/utils/dtc/dtc.git/"
+SUMMARY="Open Firmware device tree compiler"
+
+LICENCES="GPL-2"
+SLOT="0"
+PLATFORMS="~amd64 ~armv7 ~armv8 ~x86"
+MYOPTIONS=""
+
+DEPENDENCIES="
+	build:
+		sys-devel/bison
+		sys-devel/flex
+"
+
+# this is a very broken Makefile
+# it fails to build the Python library if we set our own CFLAGS
+# it also installs to crazy places
+
+src_prepare() {
+	default
+	
+	edo sed -i \
+		-e '/^CFLAGS =/s:=:+=:' \
+		-e '/^CPPFLAGS =/s:=:+=:' \
+		-e 's:-g -Os::' \
+		-e "/^PREFIX =/s:=.*:= ${EPREFIX}/usr/$(exhost --target):" \
+		-e "/^LIBDIR =/s:=.*:= \$(PREFIX)/$(exhost --target)/lib:" \
+		Makefile
+}
+
+src_compile() {
+	emake -j8 NO_PYTHON=1
+}
+
+src_test() {
+	emake NO_PYTHON=1 tests
+}
+
+src_install() {
+	emake NO_PYTHON=1 DESTDIR="${IMAGE}" install
+}