diff --git a/aegisub/Makefile.am b/aegisub/Makefile.am
index d7090aa53..a73bf1024 100644
--- a/aegisub/Makefile.am
+++ b/aegisub/Makefile.am
@@ -11,7 +11,7 @@ DARCSREV := $(strip $(shell head -n 1 ../_darcs/inventory 2>/dev/null))
 REVISION := $(if $(SVNREV),-DBUILD_SVN_REVISION=$(SVNREV)) $(if $(DARCSREV),-DBUILD_DARCS)
 BUILDINFO := -DBUILD_CREDIT="\"$(shell whoami)\"" $(REVISION)
 
-AM_CPPFLAGS = -DAEGISUB -Iposix -include posix/defines.h $(BUILDINFO)
+AM_CPPFLAGS = -DAEGISUB -Iposix $(RUBY_CFLAGS) -include posix/defines.h $(BUILDINFO)
 LDADD = posix/libposix.a ../lua51/src/liblua.a ../FexTrackerSource/libfex.a ../csri/lib/.libs/libcsri.a -lGL -lGLU
 
 if USE_LIBASS
@@ -20,9 +20,17 @@ else
 LIBASS=
 endif
 
-#	auto4_ruby_assfile.cpp
-#	auto4_ruby.cpp
-#	auto4_ruby_dialog.cpp
+if HAVE_PORTAUDIO
+PORTAUDIO=audio_player_portaudio.cpp
+else
+PORTAUDIO=
+endif
+
+#if HAVE_RUBY
+#AUTO4RUBY=auto4_ruby_assfile.cpp auto4_ruby.cpp auto4_ruby_dialog.cpp
+#else
+#AUTO4RUBY=
+#endif
 
 aegisub_SOURCES = \
 	aegisublocale.cpp \
@@ -40,7 +48,7 @@ aegisub_SOURCES = \
 	audio_display.cpp \
 	audio_karaoke.cpp \
 	audio_player.cpp \
-	audio_player_portaudio.cpp \
+	$(PORTAUDIO) \
 	audio_provider.cpp \
 	audio_provider_hd.cpp \
 	audio_provider_lavc.cpp \
@@ -52,6 +60,7 @@ aegisub_SOURCES = \
 	auto4_lua_assfile.cpp \
 	auto4_lua_dialog.cpp \
 	auto4_auto3.cpp \
+	$(AUTO4RUBY) \
 	avisynth_wrap.cpp \
 	base_grid.cpp \
 	browse_button.cpp \
diff --git a/aegisub/posix/defines.h b/aegisub/posix/defines.h
index 726211774..42dc9cb51 100644
--- a/aegisub/posix/defines.h
+++ b/aegisub/posix/defines.h
@@ -22,35 +22,22 @@ typedef int64_t __int64;
 typedef uint64_t __uint64;
 #define abs64 llabs
 
-#if defined(HAVE_LIBAVCODEC) && defined(HAVE_LIBAVFORMAT)
-#define USE_LAVC 1
-#endif
+/*
 #if defined(HAVE_ASA) && defined(HAVE_ASA_H)
 #define USE_ASA 1
 #endif
 #if defined(HAVE_LIBSSA) && defined(HAVE_LIBSSA_LIBSSA_H)
 #define USE_LIBSSA 1
 #endif
-#ifdef HAVE_LIBPORTAUDIO
-#define USE_PORTAUDIO 1
-#else
-#error no audio system available
-#endif
 
-//#define USE_HUNSPELL 0
-#ifndef USE_LAVC
-#define USE_LAVC 0
-#endif
 #define USE_PRS 0
 #ifndef USE_FEXTRACKER
-#define USE_FEXTRACKER 1
-#endif
-#ifndef USE_LIBSSA
-#define USE_LIBSSA 0
+#define USE_FEXTRACKER 0
 #endif
 #ifndef USE_ASA
 #define USE_ASA 0
 #endif
+*/
 
 #include "res.h"
 
diff --git a/configure.ac b/configure.ac
index 4c391d841..254b87257 100644
--- a/configure.ac
+++ b/configure.ac
@@ -66,11 +66,12 @@ ACX_PTHREAD([], [
 	AC_MSG_FAILURE([Aegisub needs pthreads])
 ])
 
-AC_CHECK_LIB([portaudio], [Pa_Initialize],, [AC_MSG_ERROR([portaudio not found.])])
+AC_CHECK_LIB([portaudio], [Pa_Initialize],, [with_portaudio=no])
 AC_CHECK_FUNCS([Pa_GetStreamTime])
 AC_CHECK_LIB([avcodec], [avcodec_init],, [AC_MSG_ERROR([avcodec not found.])])
 AC_CHECK_LIB([avformat], [av_read_frame],, [AC_MSG_ERROR([avformat not found.])])
 AC_CHECK_LIB([hunspell], [main],, [AC_MSG_ERROR([Hunspell not found.])])
+# AC_CHECK_LIB([ruby1.9], [ruby_init],, [with_ruby=no])
 
 AC_CHECK_HEADER([wchar.h],,[
 	AC_MSG_FAILURE([aegisub needs wide character support, find a wchar.h])
@@ -204,6 +205,8 @@ AC_HEADER_STDBOOL
 AC_CONFIG_SUBDIRS([csri])
 
 AM_CONDITIONAL([USE_LIBASS], [test "$with_libass" != "no" ])
+AM_CONDITIONAL([HAVE_PORTAUDIO], [test "$with_portaudio" != "no"])
+#AM_CONDITIONAL([HAVE_RUBY], [test "$with_ruby" != "no"])
 
 AC_OUTPUT([
 	Makefile