diff --git a/.editorconfig b/.editorconfig
index f1094a0..7ecbc3d 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,7 +1,13 @@
 root = true
+
 [*]
 end_of_line = lf
 insert_final_newline = true
+
 [*.{c,h,grr}]
 indent_style = space
 indent_size = 2
+
+[meson.build]
+indent_style = space
+indent_size = 2
diff --git a/.gitignore b/.gitignore
index 98db229..b4e10d9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
-*.o
-.cache
-/growl
+/.cache
+/build
 /.envrc
 /compile_commands.json
diff --git a/makefile b/makefile
deleted file mode 100644
index 7e917b3..0000000
--- a/makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-CC	:= cc
-CFLAGS	:= -Og -g -std=c99 -Wpedantic -Wall
-OBJS	 = chunk.o gc.o main.o object.o parser.o print.o vm.o vendor/mpc.o \
-		   vendor/yar.o
-
-growl: $(OBJS)
-	$(CC) -o growl $(OBJS)
-
-.PHONY: clean
-clean:
-	rm -f growl $(OBJS)
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..ebe2b98
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,25 @@
+project(
+  'growl',
+  'c',
+  meson_version : '>= 1.3.0',
+  version : '0.1',
+  default_options : ['buildtype=debugoptimized', 'c_std=c99', 'warning_level=3'],
+)
+
+sources = [
+  'src/chunk.c',
+  'src/compile.c',
+  'src/gc.c',
+  'src/object.c',
+  'src/parser.c',
+  'src/print.c',
+  'src/vm.c',
+  'src/vendor/mpc.c',
+  'src/vendor/yar.c',
+]
+
+exe = executable(
+  'growl',
+  'src/main.c', sources,
+  install : true,
+)
diff --git a/object.c b/object.c
deleted file mode 100644
index e69de29..0000000
diff --git a/print.c b/print.c
deleted file mode 100644
index e69de29..0000000
diff --git a/print.h b/print.h
deleted file mode 100644
index e69de29..0000000
diff --git a/shell.nix b/shell.nix
index 7ecb062..873dc3e 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,5 +3,6 @@
 pkgs.mkShell {
   buildInputs = with pkgs; [
     clang-tools bear gdb tinycc
+    meson ninja
   ];
 }
diff --git a/chunk.c b/src/chunk.c
similarity index 100%
rename from chunk.c
rename to src/chunk.c
diff --git a/chunk.h b/src/chunk.h
similarity index 100%
rename from chunk.h
rename to src/chunk.h
diff --git a/common.h b/src/common.h
similarity index 100%
rename from common.h
rename to src/common.h
diff --git a/src/compile.c b/src/compile.c
new file mode 100644
index 0000000..a510f7d
--- /dev/null
+++ b/src/compile.c
@@ -0,0 +1,6 @@
+#include "compile.h"
+
+
+I compile_program(mpc_ast_t *ast) {
+
+}
diff --git a/src/compile.h b/src/compile.h
new file mode 100644
index 0000000..2aa3751
--- /dev/null
+++ b/src/compile.h
@@ -0,0 +1,4 @@
+#include "common.h"
+#include "vendor/mpc.h"
+
+I compile_program(mpc_ast_t *);
diff --git a/gc.c b/src/gc.c
similarity index 88%
rename from gc.c
rename to src/gc.c
index 9ddf211..05043ce 100644
--- a/gc.c
+++ b/src/gc.c
@@ -3,7 +3,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "chunk.h"
 #include "gc.h"
+#include "object.h"
 #include "vendor/yar.h"
 
 #define ALIGN(n) (((n) + 7) & ~7)
@@ -18,14 +20,14 @@ V gc_reset(Gc *gc, I mark) { gc->roots.count = mark; }
 
 static O copy(Gc *gc, Hd *hdr) {
   assert(infrom(gc, hdr));
-  assert(hdr->type != TYPE_FWD);
+  assert(hdr->type != OBJ_FWD);
 
   Z sz = ALIGN(hdr->size);
   Hd *new = (Hd *)gc->to.free;
   gc->to.free += sz;
   memcpy(new, hdr, sz);
 
-  hdr->type = TYPE_FWD;
+  hdr->type = OBJ_FWD;
   O *obj = (O *)(hdr + 1);
   *obj = BOX(new);
   return *obj;
@@ -40,7 +42,7 @@ static O forward(Gc *gc, O obj) {
     return obj;
 
   Hd *hdr = UNBOX(obj);
-  if (hdr->type == TYPE_FWD) {
+  if (hdr->type == OBJ_FWD) {
     O *o = (O *)(hdr + 1);
     return *o;
   } else {
@@ -76,7 +78,13 @@ V gc_collect(Gc *gc) {
     Hd *hdr = (Hd *)scan;
     switch (hdr->type) {
       // TODO: the rest of the owl
-    case TYPE_FWD:
+    case OBJ_QUOT: {
+      Bc *chunk = (Bc *)(hdr + 1);
+      for (Z i = 0; i < chunk->constants.count; i++)
+        chunk->constants.items[i] = forward(gc, chunk->constants.items[i]);
+      break;
+    }
+    case OBJ_FWD:
       fprintf(stderr, "fatal GC error: forwarding pointer in to-space\n");
       abort();
     default:
diff --git a/gc.h b/src/gc.h
similarity index 100%
rename from gc.h
rename to src/gc.h
diff --git a/main.c b/src/main.c
similarity index 100%
rename from main.c
rename to src/main.c
diff --git a/src/object.c b/src/object.c
new file mode 100644
index 0000000..6a6de05
--- /dev/null
+++ b/src/object.c
@@ -0,0 +1,10 @@
+#include "object.h"
+
+I type(O o) {
+  if (o == NIL)
+    return TYPE_NIL;
+  if (IMM(o))
+    return TYPE_NUM;
+  Hd *h = UNBOX(o);
+  return h->type;
+}
diff --git a/object.h b/src/object.h
similarity index 76%
rename from object.h
rename to src/object.h
index fe16d90..45d2239 100644
--- a/object.h
+++ b/src/object.h
@@ -11,7 +11,14 @@
 #define ORD(x) ((O)(x) >> 1)
 
 enum {
-  TYPE_FWD,
+  OBJ_FWD = 2,
+  OBJ_QUOT,
+};
+
+enum {
+  TYPE_NIL = 0,
+  TYPE_NUM = 1,
+  TYPE_FWD = OBJ_FWD,
 };
 
 typedef uintptr_t O;
@@ -21,4 +28,6 @@ typedef struct Hd {
   U32 size, type;
 } Hd;
 
+I type(O);
+
 #endif
diff --git a/parser.c b/src/parser.c
similarity index 100%
rename from parser.c
rename to src/parser.c
diff --git a/parser.h b/src/parser.h
similarity index 99%
rename from parser.h
rename to src/parser.h
index c0b3f2a..c991dd4 100644
--- a/parser.h
+++ b/src/parser.h
@@ -4,7 +4,6 @@
 #include "common.h"
 #include "vendor/mpc.h"
 
-
 V parser_init(V);
 V parser_deinit(V);
 
diff --git a/src/print.c b/src/print.c
new file mode 100644
index 0000000..c55cafe
--- /dev/null
+++ b/src/print.c
@@ -0,0 +1,20 @@
+#include <inttypes.h>
+#include <stdio.h>
+
+#include "object.h"
+#include "print.h"
+
+V print(O o) {
+  if (o == NIL) {
+    printf("nil");
+  } else if (IMM(o)) {
+    printf("%" PRIdPTR, ORD(o));
+  } else {
+    printf("<obj type=%ld ptr=%p>", type(o), (void *)o);
+  }
+}
+
+V println(O o) {
+  print(o);
+  putchar('\n');
+}
diff --git a/src/print.h b/src/print.h
new file mode 100644
index 0000000..ed86397
--- /dev/null
+++ b/src/print.h
@@ -0,0 +1,10 @@
+#ifndef PRINT_H
+#define PRINT_H
+
+#include "common.h"
+#include "object.h"
+
+V print(O);
+V println(O);
+
+#endif
diff --git a/vendor/mpc.c b/src/vendor/mpc.c
similarity index 100%
rename from vendor/mpc.c
rename to src/vendor/mpc.c
diff --git a/vendor/mpc.h b/src/vendor/mpc.h
similarity index 100%
rename from vendor/mpc.h
rename to src/vendor/mpc.h
diff --git a/vendor/yar.c b/src/vendor/yar.c
similarity index 100%
rename from vendor/yar.c
rename to src/vendor/yar.c
diff --git a/vendor/yar.h b/src/vendor/yar.h
similarity index 100%
rename from vendor/yar.h
rename to src/vendor/yar.h
diff --git a/vm.c b/src/vm.c
similarity index 85%
rename from vm.c
rename to src/vm.c
index 20df937..accbe82 100644
--- a/vm.c
+++ b/src/vm.c
@@ -1,5 +1,7 @@
 #include "vm.h"
 #include "gc.h"
+#include "print.h"
+#include <stdio.h>
 
 static I decode_sleb128(U8 **ptr) {
   I result = 0;
@@ -45,16 +47,23 @@ V vm_run(Vm *vm, Bc *chunk, I offset) {
     U8 opcode;
     switch (opcode = *vm->ip++) {
     case OP_NOP:
-      break;
-    case OP_RETURN:
-      return;
+      continue;
     case OP_CONST: {
       I idx = decode_sleb128(&vm->ip);
       vm_push(vm, chunk->constants.items[idx]);
       break;
     }
+    case OP_RETURN:
+      goto done;
     }
   }
 
+done:
   gc_reset(&vm->gc, mark);
+  // print stack :3
+  for (O *i = vm->stack; i < vm->sp; i++) {
+    print(*i);
+    putchar(' ');
+  }
+  putchar('\n');
 }
diff --git a/vm.h b/src/vm.h
similarity index 68%
rename from vm.h
rename to src/vm.h
index 7da042d..a122267 100644
--- a/vm.h
+++ b/src/vm.h
@@ -9,8 +9,12 @@
 
 enum {
   OP_NOP = 0,
+  OP_CONST,       // Push constant to stack
+  OP_JUMP,        // Relative jump
+  OP_JUMP_IF_NIL, // Relative jump if top-of-stack is nil
+  OP_DOWORD,
+  OP_CALL,
   OP_RETURN,
-  OP_CONST,
 };
 
 #define STACK_SIZE 256