diff --git a/repos/gems/Tupfile b/repos/gems/Tupfile
new file mode 100644
index 000000000..d1ea3f417
--- /dev/null
+++ b/repos/gems/Tupfile
@@ -0,0 +1,5 @@
+ifdef NIX_OUTPUTS_DEV
+include_rules
+SED_FLAGS += -e "s|@includedir@|@(NIX_OUTPUTS_DEV)/include/os|"
+: *.pc.in |> !sed_pkgconfig_file |>
+endif
diff --git a/repos/gems/Tuprules.tup b/repos/gems/Tuprules.tup
index 454a87e16..ba90ee9d6 100644
--- a/repos/gems/Tuprules.tup
+++ b/repos/gems/Tuprules.tup
@@ -1,2 +1 @@
 REP_DIR = $(TUP_CWD)
-LIBS += genode-gems
diff --git a/repos/gems/src/lib/vfs/import/Tupfile b/repos/gems/src/lib/vfs/import/Tupfile
new file mode 100644
index 000000000..0fe51b034
--- /dev/null
+++ b/repos/gems/src/lib/vfs/import/Tupfile
@@ -0,0 +1,5 @@
+include_rules
+
+: foreach *.cc |> !cxx |> %B.o {obj}
+: {obj} |> !lib |> vfs_import.lib.so {lib}
+: foreach {lib} |> !collect_shared |>