diff --git a/Makefile b/Makefile
index c72a7b3..fa695fd 100644
--- a/Makefile
+++ b/Makefile
@@ -83,17 +83,21 @@ FLAGS += -DNDEBUG # TODO is this OK?
 supercollider := dep/supercollider/build/lang/libsclang.a
 OBJECTS += $(supercollider)
 DEPS += $(supercollider)
+DISTRIBUTABLES += dep/supercollider/SCClassLibrary
+DISTRIBUTABLES += support/supercollider_extensions
 SUPERCOLLIDER_CMAKE_FLAGS += -DSUPERNOVA=OFF -DSC_EL=OFF -DSC_VIM=OFF -DSC_ED=OFF -DSC_IDE=OFF -DSC_ABLETON_LINK=OFF -DSC_QT=OFF -DCMAKE_BUILD_TYPE=Release -DSCLANG_SERVER=OFF -DBUILD_TESTING=OFF
 SUPERCOLLIDER_SUBMODULES += external_libraries/hidapi external_libraries/nova-simd external_libraries/nova-tt external_libraries/portaudio_sc_org external_libraries/yaml-cpp
 SUPERCOLLIDER_BRANCH := topic/vcv-prototype-support
-# TODO need some better way of getting link library names!
-LDFLAGS += dep/supercollider/build/lang/../external_libraries/libtlsf.a /usr/lib/libpthread.dylib dep/supercollider/build/lang/../external_libraries/hidapi/mac/libhidapi.a dep/supercollider/build/lang/../external_libraries/hidapi/hidapi_parser/libhidapi_parser.a dep/supercollider/build/lang/../external_libraries/libboost_thread_lib.a dep/supercollider/build/lang/../external_libraries/libboost_system_lib.a dep/supercollider/build/lang/../external_libraries/libboost_regex_lib.a dep/supercollider/build/lang/../external_libraries/libboost_filesystem_lib.a /usr/local/opt/readline/lib/libreadline.dylib -framework Carbon -framework CoreAudio -framework CoreMIDI -framework CoreServices -framework IOKit -framework CoreFoundation /usr/local/opt/libsndfile/lib/libsndfile.dylib dep/supercollider/build/lang/../external_libraries/libyaml.a
+# FIXME should be able to find some better way of getting link library names!
+LDFLAGS += $$(cat dep/supercollider/build/lang/vcv_libsclang_link_line.txt)
 $(supercollider):
 	cd dep && git clone "https://github.com/supercollider/supercollider" --branch $(SUPERCOLLIDER_BRANCH) --depth 5
 	cd dep/supercollider && git submodule update --init -- $(SUPERCOLLIDER_SUBMODULES)
+	cd dep/supercollider && git apply ../../support/supercollider_get_libsclang_link_line.patch
 	cd dep/supercollider && mkdir build && cd build
 	cd dep/supercollider/build && cmake .. -G "Unix Makefiles" $(SUPERCOLLIDER_CMAKE_FLAGS)
 	cd dep/supercollider/build && $(MAKE) libsclang
+	cd dep/supercollider/build && $(MAKE) generate_libsclang_link_line
 endif
 
 # Python
diff --git a/src/SuperColliderEngine.cpp b/src/SuperColliderEngine.cpp
index d48c9c6..6db72b1 100644
--- a/src/SuperColliderEngine.cpp
+++ b/src/SuperColliderEngine.cpp
@@ -161,7 +161,7 @@ SC_VcvPrototypeClient::SC_VcvPrototypeClient(SuperColliderEngine* engine)
 {
 	using Path = SC_LanguageConfig::Path;
 	Path sc_lib_root = rack::asset::plugin(pluginInstance, "dep/supercollider/SCClassLibrary");
-	Path sc_ext_root = rack::asset::plugin(pluginInstance, "dep/supercollider_extensions");
+	Path sc_ext_root = rack::asset::plugin(pluginInstance, "support/supercollider_extensions");
 	Path sc_yaml_path = rack::asset::plugin(pluginInstance, "dep/supercollider/sclang_vcv_config.yml");
 
 	if (!SC_LanguageConfig::defaultLibraryConfig(/* isStandalone */ true))
diff --git a/support/supercollider_extensions/VcvPrototypeProcessBlock.sc b/support/supercollider_extensions/VcvPrototypeProcessBlock.sc
new file mode 100644
index 0000000..a6801fb
--- /dev/null
+++ b/support/supercollider_extensions/VcvPrototypeProcessBlock.sc
@@ -0,0 +1,23 @@
+// Represents a process block in VCV Prototype. Users should generally not create instances
+// of this class themselves, and should only modify the values in `outputs`, `knobs`, `lights`,
+// and `switchLights`.
+//
+// Original author: Brian Heim
+
+VcvPrototypeProcessBlock {
+	classvar <>numRows; // Set internally, do not modify
+
+	// Code in SuperColliderEngine.cpp relies on ordering.
+	var <sampleRate; // Float
+	var <sampleTime; // Float
+	var <bufferSize; // Integer
+	var <inputs; // Array[numRows] of Signal[bufferSize]
+	var <>outputs; // Array[numRows] of Signal[bufferSize]
+	var <>knobs; // FloatArray[numRows]
+	var <switches; // Array[numRows] of Boolean
+	var <>lights; // Array[numRows] of FloatArray[3]
+	var <>switchLights; // Array[numRows] of FloatArray[3]
+
+	// TODO not needed?
+	*new { |... args| ^super.newCopyArgs(*args); }
+}
diff --git a/support/supercollider_get_libsclang_link_line.patch b/support/supercollider_get_libsclang_link_line.patch
new file mode 100644
index 0000000..26f70aa
--- /dev/null
+++ b/support/supercollider_get_libsclang_link_line.patch
@@ -0,0 +1,22 @@
+diff --git a/lang/CMakeLists.txt b/lang/CMakeLists.txt
+index f370ad7..f73309f 100644
+--- a/lang/CMakeLists.txt
++++ b/lang/CMakeLists.txt
+@@ -388,3 +388,17 @@ else()
+         RUNTIME DESTINATION "bin"
+         PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+ endif()
++
++set(LIBSCLANG_LINK_LINE_FILE vcv_libsclang_link_line.txt)
++get_target_property(libsclang_libs libsclang INTERFACE_LINK_LIBRARIES)
++add_custom_command(OUTPUT ${LIBSCLANG_LINK_LINE_FILE} COMMAND echo)
++foreach(lib IN LISTS libsclang_libs)
++    if(TARGET ${lib})
++        add_custom_command(APPEND OUTPUT ${LIBSCLANG_LINK_LINE_FILE}
++            COMMAND echo $<TARGET_FILE:${lib}> ">>" ${LIBSCLANG_LINK_LINE_FILE})
++    else()
++        add_custom_command(APPEND OUTPUT ${LIBSCLANG_LINK_LINE_FILE}
++            COMMAND echo ${lib} ">>" ${LIBSCLANG_LINK_LINE_FILE})
++    endif()
++endforeach()
++add_custom_target(generate_libsclang_link_line DEPENDS ${LIBSCLANG_LINK_LINE_FILE})