diff --git a/Tuprules.tup b/Tuprules.tup
index 664af91..5c86076 100644
--- a/Tuprules.tup
+++ b/Tuprules.tup
@@ -20,6 +20,7 @@ CC_MARCH = -march=armv8-a
 endif
 
 GENODE_DIR = $(TUP_CWD)/upstream
+STUB_DIR = $(TUP_CWD)/stub
 
 export NIX_PATH
 NIX_BUILD = nix-build --option substitute false
@@ -162,7 +163,7 @@ PKG_CONFIG = PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) pkg-config
 
 !cc = | $(GENODE_DIR)/<pkg-config> |> ^o CC %f^ @(CC_WRAPPER) $(CC) $(DEFINES) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) `$(PKG_CONFIG) --cflags $(LIBS) $(LIBS_CFLAGS)` $(INCLUDES) -c %f -o %o |> %B.o
 
-!cc_port = | $(GENODE_DIR)/<pkg-config> |> ^o CC %o^ @(CC_WRAPPER) $(CC) -c $(DEFINES) $(CFLAGS) $(CFLAGS_%f) $(INCLUDES) `$(PKG_CONFIG) --cflags $(LIBS) $(LIBS_CFLAGS)` -o %o |> %B.o
+!cc_port = | $(GENODE_DIR)/<pkg-config> |> ^o CC %o^ @(CC_WRAPPER) $(CC) -c $(DEFINES) $(CFLAGS) $(CFLAGS_%o) $(INCLUDES) `$(PKG_CONFIG) --cflags $(LIBS) $(LIBS_CFLAGS)` -o %o |> %B.o
 
 !cxx = | $(GENODE_DIR)/<pkg-config> |> ^o CXX %b^ @(CC_WRAPPER) $(CXX) $(DEFINES) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) `$(PKG_CONFIG) --cflags $(LIBS)` $(INCLUDES) -c %f -o %o |> %B.o
 
@@ -171,3 +172,29 @@ PKG_CONFIG = PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) pkg-config
 !ld = | $(GENODE_DIR)/<lib> $(GENODE_DIR)/<pkg-config> |> ^o LD %o^ $(LD) $(LDFLAGS) `$(PKG_CONFIG) --libs $(LIBS)` %f -o %o |>
 
 !strip = |> strip -o %o %f |>
+
+&LD_SCRIPT_SO = upstream/repos/base/src/ld/genode_rel.ld
+
+ifeq (@(TUP_ARCH),x86_64)
+	ASM_SYM_DEPENDENCY = movq \1@GOTPCREL(%rip), %rax
+else
+	ASM_SYM_DEPENDENCY = .long \1
+endif
+
+!abi_stub = |> ^ STUB %o^\
+	sed \
+		-e "s/^\(\w\+\) D \(\w\+\)\$/.data; .global \1; .type \1,%%object; .size \1,\2; \1:/p" \
+		-e "s/^\(\w\+\) V/.data; .weak \1; .type \1,%%object; \1:/p" \
+		-e "s/^\(\w\+\) T/.text; .global \1; .type \1,%%function; \1:/p" \
+		-e "s/^\(\w\+\) R \(\w\+\)\$/.section .rodata; .global \1; .type \1,%%object; .size \1,\2; \1:/p" \
+		-e "s/^\(\w\+\) W/.text; .weak \1; .type \1,%%function; \1:/p" \
+		-e "s/^\(\w\+\) B \(\w\+\)\$/.bss; .global \1; .type \1,%%object; .size \1,\2; \1:/p" \
+		-e "s/^\(\w\+\) U/.text; .global \1; $(ASM_SYM_DEPENDENCY)/p" \
+		%f \
+	| $(CC) -x assembler -c - -o tmp.o; \
+	$(LD) -o %o \
+		-shared \
+		-T &(LD_SCRIPT_SO) \
+		tmp.o; \
+	rm tmp.o; \
+|> $(STUB_DIR)/%B.lib.so $(GENODE_DIR)/<stub>
diff --git a/ports/chuck/Tupfile b/ports/chuck/Tupfile
deleted file mode 100644
index ab79e9b..0000000
--- a/ports/chuck/Tupfile
+++ /dev/null
@@ -1,7 +0,0 @@
-include_rules
-
-: |> $(NIX_BUILD) .. --out-link port \
-	--attr source --attr include |> port-source port-include {port}
-
-: port-source |> cp %f/%d.pc %o \
-	|> $(PKG_CONFIG_DIR)/%d.pc $(GENODE_DIR)/<pkg-config>
diff --git a/ports/chuck/default.nix b/ports/chuck/default.nix
deleted file mode 100644
index 496472b..0000000
--- a/ports/chuck/default.nix
+++ /dev/null
@@ -1,14 +0,0 @@
-{ preparePort, chuck }:
-
-preparePort rec {
-  inherit (chuck) name version src;
-  outputs = [ "source" ];
-  
-  sourceRoot = "${name}/src";
-
-  installPhase =
-    ''
-      mkdir -p $source
-      cp -r core host scripts $source
-    '';
-}
diff --git a/ports/rtaudio/Tupfile b/ports/rtaudio/Tupfile
deleted file mode 100644
index ab79e9b..0000000
--- a/ports/rtaudio/Tupfile
+++ /dev/null
@@ -1,7 +0,0 @@
-include_rules
-
-: |> $(NIX_BUILD) .. --out-link port \
-	--attr source --attr include |> port-source port-include {port}
-
-: port-source |> cp %f/%d.pc %o \
-	|> $(PKG_CONFIG_DIR)/%d.pc $(GENODE_DIR)/<pkg-config>
diff --git a/ports/rtaudio/default.nix b/ports/rtaudio/default.nix
deleted file mode 100644
index cc8987a..0000000
--- a/ports/rtaudio/default.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ preparePort, rtaudio }:
-
-preparePort rec {
-  inherit (rtaudio) name version src;
-  outputs = [ "source" "include" ];
-  buildPhase =
-    ''
-      mkdir $source $include
-      sed \
-        -e "s|^includedir.*|include=$include|" \
-        -e 's/@PACKAGE_VERSION@/${version}/' \
-        -e 's/@req@/stdcxx/' \
-        -e 's/^Libs:.*/Libs: -l:rtaudio.lib.so/' \
-        -e '/pthread/d' \
-        -e 's/@api@/-D__GENODE_AUDIO__/' \
-        -e '/@/d' \
-        -e '/prefix/d' \
-        < rtaudio.pc.in > $source/rtaudio.pc
-    '';
-  installPhase =
-    ''
-      cp -rv RtAudio.cpp rtaudio_c.cpp include $source
-      cp RtAudio.h rtaudio_c.h $include
-    '';
-}