diff --git a/Makefile b/Makefile
index 87a40b5f..a84c71a7 100644
--- a/Makefile
+++ b/Makefile
@@ -98,7 +98,7 @@ test: test-contribs test-nostdlib test-issue
 test-contribs: picrin $(CONTRIB_TESTS)
 
 test-nostdlib: lib/ext/boot.c
-	$(CC) -I./lib -I./lib/include -D'PIC_USE_LIBC=0' -D'PIC_USE_STDIO=0' -D'PIC_USE_WRITE=0' -ffreestanding -nostdlib -Os -fPIC -shared -std=c89 -pedantic -Wall -Wextra -Werror -o libpicrin-tiny.so $(LIBPICRIN_SRCS) etc/libc_polyfill.c -fno-stack-protector
+	$(CC) -I./lib -I./lib/include -D'PIC_USE_LIBC=0' -D'PIC_USE_STDIO=0' -D'PIC_USE_WRITE=0' -D'PIC_USE_LIBRARY=0' -ffreestanding -nostdlib -Os -fPIC -shared -std=c89 -pedantic -Wall -Wextra -Werror -o libpicrin-tiny.so $(LIBPICRIN_SRCS) etc/libc_polyfill.c -fno-stack-protector
 	strip libpicrin-tiny.so
 	ls -lh libpicrin-tiny.so
 	rm -f libpicrin-tiny.so
diff --git a/bin/picrin-bootstrap b/bin/picrin-bootstrap
index 0b46e5ca..3252e510 100755
Binary files a/bin/picrin-bootstrap and b/bin/picrin-bootstrap differ
diff --git a/lib/ext/boot.c b/lib/ext/boot.c
index 9e8ef4a6..26377e29 100644
--- a/lib/ext/boot.c
+++ b/lib/ext/boot.c
@@ -2,354 +2,353 @@
 #include "picrin/extra.h"
 
 static const char boot_rom[][80] = {
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-"4 default-environment))) (core#begin (core#define .the-core-define.2254 (.the.22",
-"53 (core#quote core#define))) (core#begin (core#define .the-core-lambda.2255 (.t",
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-".2258 (.the.2253 (core#quote core#set!))) (core#begin (core#define .the-core-if.",
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-"-macro.2260 (.the.2253 (core#quote core#define-macro))) (core#begin (core#define",
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-"-lambda.2262 (.the.2253 (core#quote lambda))) (core#begin (core#define .the-begi",
-"n.2263 (.the.2253 (core#quote begin))) (core#begin (core#define .the-quote.2264 ",
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+")))) (car .clauses.2291)))) (cdr .form.2289)))) (core#begin (.define-transformer",
+".2228 (core#quote quasiquote) (core#lambda (.form.2294 .env.2295) (core#begin (c",
+"ore#define .quasiquote?.2296 (core#lambda (.form.2300) (core#if (pair? .form.230",
+"0) (core#if (identifier? (car .form.2300)) (identifier=? (.the.2229 (core#quote ",
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-
 };
 
 #if PIC_USE_LIBRARY
 static const char boot_library_rom[][80] = {
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-"-for-each (core#lambda (.c.2397) (core#if ((core#lambda (.it.2398) (core#if .it.",
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-"n.2395)) (core#if (core#if (number? .n.2395) (core#if (exact? .n.2395) (<= 0 .n.",
-"2395) #f) #f) (number->string .n.2395) (error \"symbol or non-negative integer is",
-" required\" .n.2395))))) (core#begin (core#define .join.2394 (core#lambda (.strs.",
-"2400 .delim.2401) ((core#lambda () (core#begin (core#define .loop.2402 (core#lam",
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 "re#begin (make-library (core#quote (picrin base))) (core#begin (set-car! (dictio",
 "nary-ref *libraries* (mangle (core#quote (picrin base)))) default-environment) (",
-"core#begin ((core#lambda (.export-keywords.2502) (core#begin (.export-keywords.2",
-"502 (core#quote (define lambda quote set! if begin define-macro let let* letrec ",
+"core#begin ((core#lambda (.export-keywords.2478) (core#begin (.export-keywords.2",
+"478 (core#quote (define lambda quote set! if begin define-macro let let* letrec ",
 "letrec* let-values let*-values define-values quasiquote unquote unquote-splicing",
 " and or cond case else => do when unless parameterize))) (core#begin (.export-ke",
-"ywords.2502 (core#quote (features eq? eqv? equal? not boolean? boolean=? pair? c",
+"ywords.2478 (core#quote (features eq? eqv? equal? not boolean? boolean=? pair? c",
 "ons car cdr null? set-car! set-cdr! caar cadr cdar cddr list? make-list list len",
 "gth append reverse list-tail list-ref list-set! list-copy map for-each memq memv",
 " member assq assv assoc current-input-port current-output-port current-error-por",
@@ -375,17 +374,16 @@ static const char boot_library_rom[][80] = {
 "ictionary-for-each dictionary->alist alist->dictionary dictionary->plist plist->",
 "dictionary make-record record? record-type record-datum default-environment make",
 "-environment find-identifier set-identifier! eval compile add-macro! make-epheme",
-"ron-table write write-simple write-shared display))) (.export-keywords.2502 (cor",
+"ron-table write write-simple write-shared display))) (.export-keywords.2478 (cor",
 "e#quote (find-library make-library current-library)))))) (core#lambda (.keywords",
-".2503) ((core#lambda (.env.2504 .exports.2505) (for-each (core#lambda (.keyword.",
-"2506) (dictionary-set! .exports.2505 .keyword.2506 .keyword.2506)) .keywords.250",
-"3)) (library-environment (core#quote (picrin base))) (library-exports (core#quot",
-"e (picrin base)))))) (core#begin (core#set! eval ((core#lambda (.e.2507) (core#l",
-"ambda (.expr.2508 . .lib.2509) ((core#lambda (.lib.2510) (.e.2507 .expr.2508 (li",
-"brary-environment .lib.2510))) (core#if (null? .lib.2509) (current-library) (car",
-" .lib.2509))))) eval)) (core#begin (make-library (core#quote (picrin user))) (cu",
+".2479) ((core#lambda (.env.2480 .exports.2481) (for-each (core#lambda (.keyword.",
+"2482) (dictionary-set! .exports.2481 .keyword.2482 .keyword.2482)) .keywords.247",
+"9)) (library-environment (core#quote (picrin base))) (library-exports (core#quot",
+"e (picrin base)))))) (core#begin (core#set! eval ((core#lambda (.e.2483) (core#l",
+"ambda (.expr.2484 . .lib.2485) ((core#lambda (.lib.2486) (.e.2483 .expr.2484 (li",
+"brary-environment .lib.2486))) (core#if (null? .lib.2485) (current-library) (car",
+" .lib.2485))))) eval)) (core#begin (make-library (core#quote (picrin user))) (cu",
 "rrent-library (core#quote (picrin user))))))))))))))))))))",
-
 };
 #endif
 
diff --git a/tools/mkboot.scm b/tools/mkboot.scm
index fa1a0611..f7d079bc 100644
--- a/tools/mkboot.scm
+++ b/tools/mkboot.scm
@@ -47,26 +47,26 @@
 
 
 (for-each
- (lambda (s) (display s) (newline))
- `("#include \"picrin.h\""
-   "#include \"picrin/extra.h\""
-   ""
-   "static const char boot_rom[][80] = {"
+ display
+ `("#include \"picrin.h\"\n"
+   "#include \"picrin/extra.h\"\n"
+   "\n"
+   "static const char boot_rom[][80] = {\n"
    ,(generate-rom)
-   "};"
-   ""
-   "#if PIC_USE_LIBRARY"
-   "static const char boot_library_rom[][80] = {"
+   "};\n"
+   "\n"
+   "#if PIC_USE_LIBRARY\n"
+   "static const char boot_library_rom[][80] = {\n"
    ,(generate-rom)
-   "};"
-   "#endif"
-   ""
-   "void"
-   "pic_boot(pic_state *pic)"
-   "{"
-   "  pic_load_native(pic, &boot_rom[0][0]);"
-   "#if PIC_USE_LIBRARY"
-   "  pic_load_native(pic, &boot_library_rom[0][0]);"
-   "#endif"
-   "}"))
+   "};\n"
+   "#endif\n"
+   "\n"
+   "void\n"
+   "pic_boot(pic_state *pic)\n"
+   "{\n"
+   "  pic_load_native(pic, &boot_rom[0][0]);\n"
+   "#if PIC_USE_LIBRARY\n"
+   "  pic_load_native(pic, &boot_library_rom[0][0]);\n"
+   "#endif\n"
+   "}\n"))