diff --git a/packages/net-im/lurch/lurch-scm.exheres-0 b/packages/net-im/lurch/lurch-scm.exheres-0
index 52b8162..8991e50 100644
--- a/packages/net-im/lurch/lurch-scm.exheres-0
+++ b/packages/net-im/lurch/lurch-scm.exheres-0
@@ -1,76 +1,8 @@
-# Copyright 2017 Julian Ospald <hasufell@posteo.de>
+# Copyright 2018 Julian Ospald <hasufell@posteo.de>
 # Distributed under the terms of the GNU General Public License v2
 
-SCM_REPOSITORY="https://github.com/gkdr/${PN}.git"
-SCM_axc_REPOSITORY="https://github.com/gkdr/axc.git"
-SCM_signal_REPOSITORY="https://github.com/WhisperSystems/libsignal-protocol-c.git"
-SCM_omemo_REPOSITORY="https://github.com/gkdr/libomemo.git"
-SCM_SECONDARY_REPOSITORIES="
-    axc
-    signal
-    omemo
-"
-SCM_EXTERNAL_REFS="
-    lib/axc:axc
-    lib/libomemo:omemo
-"
-SCM_axc_EXTERNAL_REFS="
-    lib/libsignal-protocol-c:signal
-"
+require lurch
 
-CMAKE_SOURCE=${WORK}/lib/axc/lib/libsignal-protocol-c
-
-require cmake [ api=2 out_of_source=false ] # don't let cmake mess with $WORK
-require scm-git
-
-SUMMARY="OMEMO for libpurple - interoperable with other OMEMO clients"
-HOMEPAGE="https://github.com/gkdr/${PN}"
-
-LICENCES="GPL-3"
 SLOT="0"
 PLATFORMS="~amd64 ~x86"
-MYOPTIONS=""
-
-DEPENDENCIES="
-    build:
-        sys-devel/libtool
-        virtual/pkg-config
-    build+run:
-        dev-db/sqlite:3
-        dev-libs/Mini-XML
-        dev-libs/glib:2
-        dev-libs/libgcrypt
-        dev-libs/libxml2:2.0
-        net-im/pidgin
-"
-
-BUGS_TO="hasufell@posteo.de"
-REMOTE_IDS="github:gkdr/${PN}"
-
-CMAKE_SRC_CONFIGURE_PARAMS=(
-    -DCMAKE_C_FLAGS="${CFLAGS} -fPIC"
-)
-
-src_prepare() {
-    # cmake part of libsignal-protocol-c
-    edo mkdir "${CMAKE_SOURCE}"/build
-    default
-}
-
-src_configure() {
-    # cmake part of libsignal-protocol-c
-    edo cd "${CMAKE_SOURCE}"/build
-    cmake_src_configure
-}
-
-src_compile() {
-    # cmake part of libsignal-protocol-c
-    emake -C "${CMAKE_SOURCE}"/build
-
-    default
-}
-
-src_install() {
-    default
-}
 
diff --git a/packages/net-im/lurch/lurch.exlib b/packages/net-im/lurch/lurch.exlib
new file mode 100644
index 0000000..3d751ec
--- /dev/null
+++ b/packages/net-im/lurch/lurch.exlib
@@ -0,0 +1,82 @@
+# Copyright 2018 Julian Ospald <hasufell@posteo.de>
+# Distributed under the terms of the GNU General Public License v2
+
+if ever is_scm ; then
+    SCM_REPOSITORY="https://github.com/gkdr/${PN}.git"
+    SCM_axc_REPOSITORY="https://github.com/gkdr/axc.git"
+    SCM_signal_REPOSITORY="https://github.com/WhisperSystems/libsignal-protocol-c.git"
+    SCM_omemo_REPOSITORY="https://github.com/gkdr/libomemo.git"
+    SCM_SECONDARY_REPOSITORIES="
+        axc
+        signal
+        omemo
+    "
+    SCM_EXTERNAL_REFS="
+        lib/axc:axc
+        lib/libomemo:omemo
+    "
+    SCM_axc_EXTERNAL_REFS="
+        lib/libsignal-protocol-c:signal
+    "
+fi
+
+if ! ever is_scm ; then
+    WORK="${WORKBASE}"
+fi
+CMAKE_SOURCE=${WORK}/lib/axc/lib/libsignal-protocol-c
+
+require cmake [ api=2 out_of_source=false ] # don't let cmake mess with $WORK
+if ever is_scm ; then
+    require scm-git
+else
+    DOWNLOADS="https://github.com/gkdr/lurch/releases/download/v${PV}/lurch-${PV}-src.tar.gz"
+fi
+
+export_exlib_phases src_prepare src_configure src_compile
+
+
+SUMMARY="OMEMO for libpurple - interoperable with other OMEMO clients"
+HOMEPAGE="https://github.com/gkdr/${PN}"
+
+LICENCES="GPL-3"
+MYOPTIONS=""
+
+DEPENDENCIES="
+    build:
+        sys-devel/libtool
+        virtual/pkg-config
+    build+run:
+        dev-db/sqlite:3
+        dev-libs/Mini-XML
+        dev-libs/glib:2
+        dev-libs/libgcrypt
+        dev-libs/libxml2:2.0
+        net-im/pidgin
+"
+
+BUGS_TO="hasufell@posteo.de"
+REMOTE_IDS="github:gkdr/${PN}"
+
+CMAKE_SRC_CONFIGURE_PARAMS=(
+    -DCMAKE_C_FLAGS="${CFLAGS} -fPIC"
+)
+
+lurch_src_prepare() {
+    # cmake part of libsignal-protocol-c
+    edo mkdir "${CMAKE_SOURCE}"/build
+    default
+}
+
+lurch_src_configure() {
+    # cmake part of libsignal-protocol-c
+    edo cd "${CMAKE_SOURCE}"/build
+    cmake_src_configure
+}
+
+lurch_src_compile() {
+    # cmake part of libsignal-protocol-c
+    emake -C "${CMAKE_SOURCE}"/build
+
+    default
+}
+