diff --git a/contrib/10.regexp/CMakeLists.txt b/contrib/10.regexp/CMakeLists.txt
index f71ccfc7..6ab06aaa 100644
--- a/contrib/10.regexp/CMakeLists.txt
+++ b/contrib/10.regexp/CMakeLists.txt
@@ -7,7 +7,7 @@ if (REGEX_FOUND)
 
   file(GLOB PICRIN_REGEX_SOURCES ${PROJECT_SOURCE_DIR}/contrib/10.regexp/src/*.c)
 
-  list(APPEND PICRIN_CONTRIB_INITS "void pic_init_regexp(pic_state *)\; pic_init_regexp(pic)\;")
+  list(APPEND PICRIN_CONTRIB_INITS regexp)
   list(APPEND PICRIN_CONTRIB_LIBRARIES ${REGEX_LIBRARIES})
   list(APPEND PICRIN_CONTRIB_SOURCES ${PICRIN_REGEX_SOURCES})
 endif()
diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 2487f0d0..11050d90 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -3,5 +3,3 @@ list(SORT CONTRIBS)
 foreach(contrib ${CONTRIBS})
   include(${contrib})
 endforeach()
-
-add_definitions("-DPIC_CONTRIB_INITS=${PICRIN_CONTRIB_INITS}")
diff --git a/etc/mkinit.pl b/etc/mkinit.pl
new file mode 100755
index 00000000..d559db27
--- /dev/null
+++ b/etc/mkinit.pl
@@ -0,0 +1,32 @@
+#!/usr/bin/perl
+
+use strict;
+
+print <<EOL;
+/**
+ *                                !!NOTICE!!
+ * This file was automatically generated by mkinit.pl, and includes all of
+ * the prelude files required by Picrin. PLEASE DO NOT EDIT THIS FILE, changes
+ * will be overwritten the next time the script runs.
+ */
+
+#include "picrin.h"
+
+void
+pic_init_contrib(pic_state *pic)
+{
+EOL
+
+foreach my $lib (@ARGV) {
+    print "  void pic_init_$lib(pic_state *);\n";
+}
+
+print;
+
+foreach my $lib (@ARGV) {
+    print "  pic_init_$lib(pic);\n";
+}
+
+print <<EOL;
+}
+EOL
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9318f442..f3e51499 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,8 +1,9 @@
+find_package(Perl REQUIRED)
+
 # xfile
 set(XFILE_SOURCES extlib/xfile/xfile.c)
 
 # piclib
-find_package(Perl REQUIRED)
 set(PICLIB_SOURCE ${PROJECT_SOURCE_DIR}/src/load_piclib.c)
 add_custom_command(
   OUTPUT ${PICLIB_SOURCE}
@@ -11,9 +12,18 @@ add_custom_command(
   WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
   )
 
+# contrib
+set(CONTRIB_INIT ${PROJECT_SOURCE_DIR}/src/init_contrib.c)
+add_custom_command(
+  OUTPUT ${CONTRIB_INIT}
+  COMMAND ${PERL_EXECUTABLE} etc/mkinit.pl ${PICRIN_CONTRIB_INITS} > ${CONTRIB_INIT}
+  DEPENDS ${PICRIN_CONTRIB_SOURCES}
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+  )
+
 # build!
 file(GLOB PICRIN_SOURCES ${PROJECT_SOURCE_DIR}/src/*.c)
-add_library(picrin SHARED ${PICRIN_SOURCES} ${PICLIB_SOURCE} ${XFILE_SOURCES} ${PICRIN_CONTRIB_SOURCES})
+add_library(picrin SHARED ${PICRIN_SOURCES} ${PICLIB_SOURCE} ${XFILE_SOURCES} ${PICRIN_CONTRIB_SOURCES} ${CONTRIB_INIT})
 target_link_libraries(picrin m ${PICRIN_CONTRIB_LIBRARIES})
 
 # install
diff --git a/src/init.c b/src/init.c
index c6667a3b..b59e0600 100644
--- a/src/init.c
+++ b/src/init.c
@@ -31,15 +31,10 @@ void pic_init_load(pic_state *);
 void pic_init_write(pic_state *);
 void pic_init_read(pic_state *);
 void pic_init_dict(pic_state *);
+void pic_init_contrib(pic_state *);
 
 void pic_load_piclib(pic_state *);
 
-void
-pic_init_contrib(pic_state *pic)
-{
-  PIC_CONTRIB_INITS
-}
-
 #define push_sym(pic, name, list)                                       \
   pic_push(pic, pic_symbol_value(pic_intern_cstr(pic, name)), list)