diff --git a/mod.config b/mod.config
index f4c362d..df47276 100644
--- a/mod.config
+++ b/mod.config
@@ -86,6 +86,10 @@ PACKAGING_WINDOWS_REGISTRY_KEY="OpenRAExampleMod"
 # The git tag to use for the AppImage dependencies.
 PACKAGING_APPIMAGE_DEPENDENCIES_TAG="20180408"
 
+# Space delimited list of additional files/directories to copy from the engine directory
+# when packaging your mod. e.g. "./mods/modcontent" or "./mods/d2k/OpenRA.Mods.D2k.dll"
+PACKAGING_COPY_ENGINE_FILES=""
+
 ##############################################################################
 # Advanced Configuration
 #
diff --git a/packaging/linux/buildpackage.sh b/packaging/linux/buildpackage.sh
index d4efa9a..c1a3bc3 100755
--- a/packaging/linux/buildpackage.sh
+++ b/packaging/linux/buildpackage.sh
@@ -64,6 +64,11 @@ make core SDK="-sdk:4.5"
 make install-engine prefix="usr" DESTDIR="${BUILTDIR}/"
 make install-common-mod-files prefix="usr" DESTDIR="${BUILTDIR}/"
 
+for f in ${PACKAGING_COPY_ENGINE_FILES}; do
+  mkdir -p "${BUILTDIR}/usr/lib/openra/$(dirname "${f}")"
+  cp -r "${f}" "${BUILTDIR}/usr/lib/openra/${f}"
+done
+
 popd > /dev/null
 popd > /dev/null
 
diff --git a/packaging/osx/buildpackage.sh b/packaging/osx/buildpackage.sh
index 08a9a09..2c4a142 100755
--- a/packaging/osx/buildpackage.sh
+++ b/packaging/osx/buildpackage.sh
@@ -75,6 +75,12 @@ make osx-dependencies
 make core SDK="-sdk:4.5"
 make install-engine gameinstalldir="/Contents/Resources/" DESTDIR="${BUILTDIR}/OpenRA.app"
 make install-common-mod-files gameinstalldir="/Contents/Resources/" DESTDIR="${BUILTDIR}/OpenRA.app"
+
+for f in ${PACKAGING_COPY_ENGINE_FILES}; do
+  mkdir -p "${BUILTDIR}/OpenRA.app/Contents/Resources/$(dirname "${f}")"
+  cp -r "${f}" "${BUILTDIR}/OpenRA.app/Contents/Resources/${f}"
+done
+
 popd > /dev/null
 popd > /dev/null
 
diff --git a/packaging/windows/buildpackage.sh b/packaging/windows/buildpackage.sh
index 52b8eae..01f5279 100755
--- a/packaging/windows/buildpackage.sh
+++ b/packaging/windows/buildpackage.sh
@@ -63,6 +63,12 @@ make windows-dependencies
 make core SDK="-sdk:4.5"
 make install-engine gameinstalldir="" DESTDIR="${BUILTDIR}"
 make install-common-mod-files gameinstalldir="" DESTDIR="${BUILTDIR}"
+
+for f in ${PACKAGING_COPY_ENGINE_FILES}; do
+  mkdir -p "${BUILTDIR}/$(dirname "${f}")"
+  cp -r "${f}" "${BUILTDIR}/${f}"
+done
+
 popd > /dev/null
 popd > /dev/null