diff --git a/compiler/cc.v b/compiler/cc.v
index f4cdf9936d..393ec89356 100644
--- a/compiler/cc.v
+++ b/compiler/cc.v
@@ -66,7 +66,15 @@ fn (v mut V) cc() {
 		// Create the modules & out directory if it's not there.
 		out_dir := '$v_modules_path${os.PathSeparator}$v.dir'
 		if !os.dir_exists(out_dir) {
-			os.mkdir(out_dir)
+			// create recursive
+			mut mkpath := v_modules_path
+			for subdir in v.dir.split(os.PathSeparator) {
+				mkpath += os.PathSeparator + subdir
+				if !os.dir_exists(mkpath) {
+					os.mkdir(mkpath)
+				}
+			}
+			//os.mkdir(out_dir)
 		}
 		v.out_name = '${out_dir}.o' //v.out_name
 		println('Building ${v.out_name}...')
@@ -120,16 +128,17 @@ fn (v mut V) cc() {
 			os.system('$vexe build module vlib/builtin')
 		}
 		for imp in v.table.imports {
-			if imp == 'webview' {
-				continue
-			}
-			path := 	'$v_modules_path/vlib/${imp}.o'
-			println('adding ${imp}.o')
+			if imp.contains('vweb') { continue } // not working
+			if imp == 'webview' { continue }
+			
+			imp_path := imp.replace('.', os.PathSeparator)
+			path := 	'$v_modules_path/vlib/${imp_path}.o'
+			println('adding ${imp_path}.o')
 			if os.file_exists(path) {
 				libs += ' ' + path
 			} else {
 				println('$path not found... building module $imp')
-				os.system('$vexe build module vlib/$imp')
+				os.system('$vexe build module vlib/$imp_path')
 			}	
 		}
 	}
diff --git a/compiler/cheaders.v b/compiler/cheaders.v
index 2753c09f28..4978d1d6b0 100644
--- a/compiler/cheaders.v
+++ b/compiler/cheaders.v
@@ -150,7 +150,6 @@ typedef map map_string;
 byteptr g_str_buf;
 int load_so(byteptr);
 void reload_so();
-void init_consts();
 '
 
 js_headers = '
@@ -176,10 +175,5 @@ var rune = function() {}
 var map_string = function() {}
 var map_int = function() {}
 
-function init_consts() {
-	
-}	
-
 '
-
 )
diff --git a/compiler/fn.v b/compiler/fn.v
index 8cf3572aa1..1c535146b3 100644
--- a/compiler/fn.v
+++ b/compiler/fn.v
@@ -254,7 +254,8 @@ fn (p mut Parser) fn_decl() {
 	}
 	// full mod function name
 	// os.exit ==> os__exit()
-	if !is_c && !p.builtin_mod && receiver_typ.len == 0 {
+	// if !is_c && !p.builtin_mod && receiver_typ.len == 0 {
+	if !is_c && receiver_typ.len == 0 && (!p.builtin_mod || (p.builtin_mod && f.name == 'init')) {
 		f.name = p.prepend_mod(f.name)
 	}
 	if p.first_pass() && receiver_typ.len == 0 {
@@ -363,6 +364,7 @@ fn (p mut Parser) fn_decl() {
 			p.gen_fn_decl(f, typ, str_args)
 		}
 	}
+
 	if is_fn_header {
 		p.genln('$typ $fn_name_cgen($str_args);')
 		p.fgenln('')
diff --git a/compiler/gen_c.v b/compiler/gen_c.v
index 6bbf42ae67..f9cc3f285d 100644
--- a/compiler/gen_c.v
+++ b/compiler/gen_c.v
@@ -227,6 +227,7 @@ fn (table mut Table) fn_gen_name(f &Fn) string {
 		f.mod != 'darwin' &&
 		f.mod != 'os' &&
 		f.mod != 'json' &&
+		!f.name.ends_with('_init') &&
 		!f.name.contains('window_proc') &&
 		!name.ends_with('_str') &&
 		!name.contains('contains') {
diff --git a/compiler/main.v b/compiler/main.v
index 1e48c9dc01..fd6e9bae07 100644
--- a/compiler/main.v
+++ b/compiler/main.v
@@ -71,6 +71,7 @@ mut:
 	mod        string       // module being built with -lib
 	parsers    []Parser
 	vgen_buf   strings.Builder // temporary buffer for generated V code (.str() etc)
+	cached_mods []string
 }
 
 struct Preferences {
@@ -269,6 +270,15 @@ fn (v mut V) compile() {
 	for file in v.files {
 		v.parse(file, .decl)
 	}
+
+	// generate missing module init's 
+	init_parsers := v.module_gen_init_parsers()
+	// run decl pass
+	for i in 0..init_parsers.len {
+		mut ip := init_parsers[i]
+		ip.parse(.decl)
+	}
+
 	// Main pass
 	cgen.pass = Pass.main
 	if v.pref.is_debug {
@@ -334,6 +344,11 @@ fn (v mut V) compile() {
 			// new vfmt is not ready yet
 		}
 	}
+	// run main parser on the init parsers
+	for i in 0..init_parsers.len {
+		mut ip := init_parsers[i]
+		ip.parse(.main)
+	}
 	// Generate .vh if we are building a module
 	if v.pref.build_mode == .build_module {
 		v.generate_vh()
@@ -345,9 +360,13 @@ fn (v mut V) compile() {
 	v.vgen_buf.free()
 	vgen_parser.parse(.main)
 	// v.parsers.add(vgen_parser)
-	v.log('Done parsing.')
+	
 	// All definitions
 	mut def := strings.new_builder(10000)// Avoid unnecessary allocations
+	if v.pref.build_mode == .build_module {
+		init_fn_name := v.mod.replace('.', '__') + '__init_consts'
+		def.writeln('void $init_fn_name();')
+	}
 	$if !js {
 		def.writeln(cgen.includes.join_lines())
 		def.writeln(cgen.typedefs.join_lines())
@@ -365,6 +384,7 @@ fn (v mut V) compile() {
 		def.writeln(v.prof_counters())
 	}
 	cgen.lines[defs_pos] = def.str()
+	v.generate_init()
 	v.generate_main()
 	v.generate_hot_reload_code()
 	if v.pref.is_verbose {
@@ -380,28 +400,68 @@ fn (v mut V) compile() {
 	v.cc()
 }
 
-fn (v mut V) generate_main() {
-	mut cgen := v.cgen
-	$if js { return }
+fn (v mut V) module_gen_init_parsers() []Parser  {
+	mut parsers := []Parser
+	if v.pref.build_mode == .build_module {
+		init_fn_name := mod_gen_name(v.mod) + '__init'
+		if !v.table.known_fn(init_fn_name) {
+			mod_def := if v.mod.contains('.') { v.mod.all_after('.') } else { v.mod }
+			mut fn_v := 'module $mod_def\n\n'
+			fn_v += 'fn init() { /*println(\'$v.mod module init\')*/ }'
+			mut p := v.new_parser_from_string(fn_v, 'init_gen_$v.mod')
+			p.mod = v.mod
+			parsers << p
+		}
+	}
+	else if v.pref.build_mode == .default_mode {
+		for mod in v.table.imports {
+			if mod in v.cached_mods { continue }
+			init_fn_name := mod_gen_name(mod) + '__init'
+			if !v.table.known_fn(init_fn_name) {
+				mod_def := if mod.contains('.') { mod.all_after('.') } else { mod }
+				mut fn_v := 'module $mod_def\n\n'
+				fn_v += 'fn init() { /*println(\'$v.mod module init\')*/ }'
+				mut p := v.new_parser_from_string(fn_v, 'init_gen_$mod')
+				p.mod = mod
+				parsers << p
+			}
+		}
+	}
+	return parsers
+}
 
-	///// After this point, the v files are compiled.
-	///// The rest is auto generated code, which will not have
-	///// different .v source file/line numbers.
-	lines_so_far := cgen.lines.join('\n').count('\n') + 5
-	cgen.genln('')
-	cgen.genln('////////////////// Reset the file/line numbers //////////')
-	cgen.lines << '#line $lines_so_far "${cescaped_path(os.realpath(cgen.out_path))}"'
-	cgen.genln('')
-	
+fn (v mut V) generate_init() {
+	$if js { return }
+	if v.pref.build_mode == .build_module {
+		nogen := v.cgen.nogen
+		v.cgen.nogen = false
+		consts_init_body := v.cgen.consts_init.join_lines()
+		init_fn_name := mod_gen_name(v.mod) + '__init_consts'
+		println('generating init for $v.mod: $init_fn_name')
+		v.cgen.genln('void ${init_fn_name}() {\n$consts_init_body\n}')
+		v.cgen.nogen = nogen
+	}
 	if v.pref.build_mode == .default_mode {
-		mut consts_init_body := cgen.consts_init.join_lines()
+		mut call_mod_init := ''
+		mut call_mod_init_consts := ''
+		for mod in v.table.imports {
+			init_fn_name := mod_gen_name(mod) + '__init'
+			call_mod_init += '${init_fn_name}();\n'
+			if mod in v.cached_mods {
+				call_mod_init_consts += '${init_fn_name}_consts();\n'
+			}
+		}
+		consts_init_body := v.cgen.consts_init.join_lines()
 		// vlib can't have `init_consts()`
-		cgen.genln('void init_consts() {
+		v.cgen.genln('void init() {
 g_str_buf=malloc(1000);
+$call_mod_init_consts
 $consts_init_body
+builtin__init();
+$call_mod_init
 }')
 		// _STR function can't be defined in vlib
-		cgen.genln('
+		v.cgen.genln('
 string _STR(const char *fmt, ...) {
 	va_list argptr;
 	va_start(argptr, fmt);
@@ -435,6 +495,20 @@ string _STR_TMP(const char *fmt, ...) {
 
 ')
 	}
+}
+
+fn (v mut V) generate_main() {
+	mut cgen := v.cgen
+	$if js { return }
+
+	///// After this point, the v files are compiled.
+	///// The rest is auto generated code, which will not have
+	///// different .v source file/line numbers.
+	lines_so_far := cgen.lines.join('\n').count('\n') + 5
+	cgen.genln('')
+	cgen.genln('////////////////// Reset the file/line numbers //////////')
+	cgen.lines << '#line $lines_so_far "${cescaped_path(os.realpath(cgen.out_path))}"'
+	cgen.genln('')
 
 	// Make sure the main function exists
 	// Obviously we don't need it in libraries
@@ -483,7 +557,7 @@ string _STR_TMP(const char *fmt, ...) {
 
 fn (v mut V) gen_main_start(add_os_args bool){
 	v.cgen.genln('int main(int argc, char** argv) { ')
-	v.cgen.genln('  init_consts();')
+	v.cgen.genln('  init();')
 	if add_os_args && 'os' in v.table.imports {
 		v.cgen.genln('  os__args = os__init_os_args(argc, (byteptr*)argv);')
 	}
@@ -597,6 +671,10 @@ fn (v mut V) add_v_files_to_compile() {
 	// Parse user imports
 	for file in v.get_user_files() {
 		mut p := v.new_parser_from_file(file)
+		// set mod so we dont have to resolve submodule
+		if v.pref.build_mode == .build_module && file.contains(v.mod.replace('.', os.PathSeparator)) {
+			p.mod = v.mod
+		}
 		p.parse(.imports)
 		//if p.pref.autofree {		p.scanner.text.free()		free(p.scanner)	}
 		v.add_parser(p)
@@ -617,11 +695,12 @@ fn (v mut V) add_v_files_to_compile() {
 		}
 		
 		// use cached built module if exists
-		if v.pref.build_mode != .build_module {
-			vh_path := '$v_modules_path/${mod}.vh'
-			//println(vh_path)
+		if v.pref.build_mode != .build_module && !mod.contains('vweb') {
+			mod_path := mod.replace('.', os.PathSeparator)
+			vh_path := '$v_modules_path/${mod_path}.vh'
 			if v.pref.is_debug && os.file_exists(vh_path) {
 				println('using cached module `$mod`: $vh_path')
+				v.cached_mods << mod
 				v.files << vh_path
 				continue
 			}
@@ -791,15 +870,18 @@ fn new_v(args[]string) &V {
 	if joined_args.contains('build module ') {
 		build_mode = .build_module
 		// v build module ~/v/os => os.o
-		mod = if adir.contains(os.PathSeparator) {
+		mod_path := if adir.contains('vlib') {
+			adir.all_after('vlib'+os.PathSeparator)
+		}
+		else if adir.contains(os.PathSeparator) {
 			adir.all_after(os.PathSeparator)
 		} else {
 			adir
 		}
+		mod = mod_path.replace(os.PathSeparator, '.')
 		println('Building module "${mod}" (dir="$dir")...')
 		//out_name = '$TmpPath/vlib/${base}.o'
-		out_name = mod + '.o'
-		println('$out_name')
+		out_name = mod
 		// Cross compiling? Use separate dirs for each os
 		/*
 		if target_os != os.user_os() {
diff --git a/compiler/module_header.v b/compiler/module_header.v
index f3d3c063e2..a75da90a91 100644
--- a/compiler/module_header.v
+++ b/compiler/module_header.v
@@ -106,17 +106,27 @@ fn v_type_str(typ_ string) string {
 
 fn (v &V) generate_vh() {
 	println('\n\n\n\nGenerating a V header file for module `$v.mod`')
-	dir := '$v_modules_path${os.PathSeparator}$v.mod'
+	mod_path := v.mod.replace('.', os.PathSeparator)
+	dir := '$v_modules_path${os.PathSeparator}$mod_path'
 	path := dir + '.vh'
 	if !os.dir_exists(dir) {
-		os.mkdir(dir)
+		// create recursive
+		mut mkpath := v_modules_path
+		for subdir in mod_path.split(os.PathSeparator) {
+			mkpath += os.PathSeparator + subdir
+			if !os.dir_exists(mkpath) {
+				os.mkdir(mkpath)
+			}
+		}
+		// os.mkdir(os.realpath(dir))
 	}
 	println(path)
 	
 	file := os.create(path) or { panic(err) }
 	// Consts
+	mod_def := if v.mod.contains('.') { v.mod.all_after('.') } else { v.mod }
 	file.writeln('// $v.mod module header \n')
-	file.writeln('module $v.mod')
+	file.writeln('module $mod_def')
 	file.writeln('// Consts')
 	if v.table.consts.len > 0 {
 		file.writeln('const (')
diff --git a/compiler/modules.v b/compiler/modules.v
index b47e06a60c..f06e0e2bb3 100644
--- a/compiler/modules.v
+++ b/compiler/modules.v
@@ -60,3 +60,11 @@ fn (v &V) find_module_path(mod string) ?string {
 	}
 	return import_path
 }
+
+fn mod_gen_name(mod string) string {
+	return mod.replace('.', '_dot_')
+}
+
+fn mod_gen_name_rev(mod string) string {
+	return mod.replace('_dot_', '.')
+}
\ No newline at end of file
diff --git a/compiler/parser.v b/compiler/parser.v
index 3211ef32fd..9568ea762c 100644
--- a/compiler/parser.v
+++ b/compiler/parser.v
@@ -245,18 +245,26 @@ fn (p mut Parser) parse(pass Pass) {
 	//p.log('\nparse() run=$p.pass file=$p.file_name tok=${p.strtok()}')// , "script_file=", script_file)
 	// `module main` is not required if it's a single file program
 	if p.is_script || p.pref.is_test {
-		p.mod = 'main'
 		// User may still specify `module main`
 		if p.tok == .key_module {
 			p.next()
 			p.fgen('module ')
-			p.mod = p.check_name()
+			mod := p.check_name()
+			if p.mod == '' {
+				p.mod = mod
+			}
+		} else {
+			p.mod = 'main'
 		}
 	}
 	else {
 		p.check(.key_module)
 		p.fspace()
-		p.mod = p.check_name()
+		// setting mod manually for mod init parsers
+		mod := p.check_name()
+		if p.mod == '' {
+			p.mod = mod
+		}
 	}
 	//
 	
@@ -270,12 +278,13 @@ fn (p mut Parser) parse(pass Pass) {
 	p.builtin_mod = p.mod == 'builtin'
 	p.can_chash = p.mod=='ui' || p.mod == 'darwin'// TODO tmp remove
 	// Import pass - the first and the smallest pass that only analyzes imports
-	// fully qualify the module name, eg base64 to encoding.base64
+	
 	fq_mod := p.table.qualify_module(p.mod, p.file_path)
 	p.import_table.module_name = fq_mod
 	p.table.register_module(fq_mod)
 	// replace "." with "_dot_" in module name for C variable names
-	p.mod = fq_mod.replace('.', '_dot_')
+	p.mod = mod_gen_name(fq_mod)
+
 	if p.pass == .imports {
 		for p.tok == .key_import && p.peek() != .key_const {
 			p.imports()
@@ -1063,7 +1072,7 @@ fn (p mut Parser) get_type() string {
 			if !p.builtin_mod && p.import_table.known_alias(typ) {
 				mod := p.import_table.resolve_alias(typ)
 				if mod.contains('.') {
-					typ = mod.replace('.', '_dot_')
+					typ = mod_gen_name(mod)
 				}
 			}
 			p.next()
@@ -1791,7 +1800,7 @@ fn (p mut Parser) name_expr() string {
 			p.import_table.register_used_import(name)
 			// we replaced "." with "_dot_" in p.mod for C variable names,
 			// do same here.
-			mod = p.import_table.resolve_alias(name).replace('.', '_dot_')
+			mod = mod_gen_name(p.import_table.resolve_alias(name))
 		}
 		p.next()
 		p.check(.dot)
@@ -1956,7 +1965,7 @@ fn (p mut Parser) name_expr() string {
 			// If orig_name is a mod, then printing undefined: `mod` tells us nothing
 			// if p.table.known_mod(orig_name) {
 			if p.table.known_mod(orig_name) || p.import_table.known_alias(orig_name) {
-				name = name.replace('__', '.').replace('_dot_', '.')
+				name = mod_gen_name_rev(name.replace('__', '.'))
 				p.error('undefined: `$name`')
 			}
 			else {
diff --git a/vlib/builtin/builtin.v b/vlib/builtin/builtin.v
index 90e216437e..e630f40dbf 100644
--- a/vlib/builtin/builtin.v
+++ b/vlib/builtin/builtin.v
@@ -4,7 +4,7 @@
 
 module builtin
 
-fn builtin_init() int {
+fn init() {
 	$if windows {	
 		if is_atty(0) {
 			C._setmode(C._fileno(C.stdin), C._O_U16TEXT)
@@ -15,13 +15,8 @@ fn builtin_init() int {
 		C.SetConsoleMode(C.GetStdHandle(C.STD_OUTPUT_HANDLE), C.ENABLE_PROCESSED_OUTPUT | 0x0004) // ENABLE_VIRTUAL_TERMINAL_PROCESSING
 		C.setbuf(C.stdout,0)
 	}
-	return 1
 }
 
-const (
-	_ = builtin_init()
-)
-
 fn C.memcpy(byteptr, byteptr, int)
 fn C.memmove(byteptr, byteptr, int)
 //fn C.malloc(int) byteptr
diff --git a/vlib/http/http.v b/vlib/http/http.v
index 8493be3d3f..9271c98870 100644
--- a/vlib/http/http.v
+++ b/vlib/http/http.v
@@ -9,7 +9,6 @@ import http.chunked
 
 const (
 	max_redirects = 4
-	_ = http.init()
 )
 
 struct Request {
diff --git a/vlib/net/net.v b/vlib/net/net.v
index 2101d36cc8..c04f402fc4 100644
--- a/vlib/net/net.v
+++ b/vlib/net/net.v
@@ -1,9 +1,5 @@
 module net
 
-const (
-	_ = net.init()
-)
-
 // hostname returns the host name reported by the kernel. 
 pub fn hostname() ?string {
   	mut name := [256]byte