diff --git a/packaging/linux/deb/DEBIAN/postinst b/packaging/linux/deb/DEBIAN/postinst
new file mode 100755
index 0000000000..b6f1cf5f5d
--- /dev/null
+++ b/packaging/linux/deb/DEBIAN/postinst
@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+# Register default mods for in-game switching
+mkdir -p "{SYSTEMSUPPORTDIR}/ModMetadata"
+mono {LIBDIR}/OpenRA.Utility.exe ra --register-mod /usr/games/openra-ra system
+mono {LIBDIR}/OpenRA.Utility.exe cnc --register-mod /usr/games/openra-cnc system
+mono {LIBDIR}/OpenRA.Utility.exe d2k --register-mod /usr/games/openra-d2k system
diff --git a/packaging/linux/deb/DEBIAN/prerm b/packaging/linux/deb/DEBIAN/prerm
new file mode 100755
index 0000000000..753528aef9
--- /dev/null
+++ b/packaging/linux/deb/DEBIAN/prerm
@@ -0,0 +1,6 @@
+#!/bin/sh
+set -e
+
+mono {LIBDIR}/OpenRA.Utility.exe ra --unregister-mod system
+mono {LIBDIR}/OpenRA.Utility.exe cnc --unregister-mod system
+mono {LIBDIR}/OpenRA.Utility.exe d2k --unregister-mod system
diff --git a/packaging/linux/deb/buildpackage.sh b/packaging/linux/deb/buildpackage.sh
index 2aa6e5a9e2..6ad582caf1 100755
--- a/packaging/linux/deb/buildpackage.sh
+++ b/packaging/linux/deb/buildpackage.sh
@@ -21,6 +21,7 @@ DEB_BUILD_ROOT="$(pwd)/build"
 
 LIBDIR=/usr/lib/openra
 DOCDIR=/usr/share/doc/openra
+SYSTEMSUPPORTDIR=/var/games/openra
 LINTIANORDIR=/usr/share/lintian/overrides
 E_BADARGS=85
 
@@ -80,6 +81,9 @@ else
 fi
 
 sed "s/{VERSION}/${VERSION}/" DEBIAN/control | sed "s/{SIZE}/${PACKAGE_SIZE}/" > "${DEB_BUILD_ROOT}/DEBIAN/control"
+sed "s|{LIBDIR}|${LIBDIR}|g" DEBIAN/postinst | sed "s|{SYSTEMSUPPORTDIR}|${SYSTEMSUPPORTDIR}|g" > "${DEB_BUILD_ROOT}/DEBIAN/postinst"
+sed "s|{LIBDIR}|${LIBDIR}|g" DEBIAN/prerm | sed "s|{SYSTEMSUPPORTDIR}|${SYSTEMSUPPORTDIR}|g" > "${DEB_BUILD_ROOT}/DEBIAN/prerm"
+chmod 0755 "${DEB_BUILD_ROOT}/DEBIAN/postinst" "${DEB_BUILD_ROOT}/DEBIAN/prerm"
 
 # Build it in the temp directory, but place the finished deb in our starting directory
 pushd "${DEB_BUILD_ROOT}" >/dev/null