diff --git a/cmd/tools/fast/fast.v b/cmd/tools/fast/fast.v
index 00dc25cc86d3b6..2e42b84aadd9f5 100644
--- a/cmd/tools/fast/fast.v
+++ b/cmd/tools/fast/fast.v
@@ -6,6 +6,7 @@ import time
 import arrays
 import log
 
+const args = arguments()
 const warmup_samples = 2
 
 const max_samples = 20
@@ -54,7 +55,7 @@ fn main() {
 	if vdir.contains('/tmp/cirrus-ci-build') {
 		ccompiler_path = 'clang'
 	}
-	if os.args.contains('-clang') {
+	if args.contains('-clang') {
 		ccompiler_path = 'clang'
 	}
 	elog('fast_dir: ${fast_dir} | vdir: ${vdir} | compiler: ${ccompiler_path}')
@@ -68,7 +69,7 @@ fn main() {
 		os.create('table.html')!
 	}
 
-	if !os.args.contains('-noupdate') {
+	if !args.contains('-noupdate') {
 		elog('Fetching updates...')
 		ret := lsystem('${vdir}/v up')
 		if ret != 0 {
@@ -83,7 +84,7 @@ fn main() {
 		uploaded_index := os.read_file('fast.vlang.io/index.html')!
 		if uploaded_index.contains('>${commit}<') {
 			elog('NOTE: commit ${commit} had been benchmarked already.')
-			if !os.args.contains('-force') {
+			if !args.contains('-force') {
 				elog('nothing more to do')
 				return
 			}
@@ -98,21 +99,21 @@ fn main() {
 	elog('Benchmarking commit ${commit} , with commit message: "${message}", commit_date: ${commit_date}, date: ${date}')
 
 	// build an optimized V
-	if os.args.contains('-do-not-rebuild-vprod') {
+	if args.contains('-do-not-rebuild-vprod') {
 		if !os.exists('vprod') {
 			elog('Exiting, since if you use `-do-not-rebuild-vprod`, you should already have a `${vdir}/vprod` executable, but it is missing!')
 			return
 		}
 	} else {
 		elog('  Building vprod...')
-		if os.args.contains('-noprod') {
+		if args.contains('-noprod') {
 			lexec('./v -o vprod cmd/v') // for faster debugging
 		} else {
 			lexec('./v -o vprod -prod -prealloc cmd/v')
 		}
 	}
 
-	if !os.args.contains('-do-not-rebuild-caches') {
+	if !args.contains('-do-not-rebuild-caches') {
 		elog('clearing caches...')
 		// cache vlib modules
 		lexec('${vdir}/v wipe-cache')
@@ -163,7 +164,7 @@ fn main() {
 	res.close()
 
 	// upload the result to github pages
-	if os.args.contains('-upload') {
+	if args.contains('-upload') {
 		$if freebsd {
 			// Note: tcc currently can not compile vpm on FreeBSD, due to its dependence on net.ssl and net.mbedtls, so force using clang instead:
 			elog('FreeBSD: compiling the VPM tool with clang...')
diff --git a/cmd/tools/vself.v b/cmd/tools/vself.v
index f74b1884738fee..5e42b0f86ab6e6 100644
--- a/cmd/tools/vself.v
+++ b/cmd/tools/vself.v
@@ -4,7 +4,8 @@ import os
 import os.cmdline
 import v.util.recompilation
 
-const is_debug = os.args.contains('-debug')
+const args_ = arguments()
+const is_debug = args_.contains('-debug')
 
 // support a renamed `v` executable too:
 const vexe = os.getenv_opt('VEXE') or { @VEXE }
@@ -24,7 +25,7 @@ fn main() {
 	recompilation.must_be_enabled(vroot, 'Please install V from source, to use `${vexe_name} self` .')
 	os.chdir(vroot)!
 	os.setenv('VCOLORS', 'always', true)
-	mut args := os.args[1..].filter(it != 'self')
+	mut args := args_[1..].filter(it != 'self')
 	if args.len == 0 || ('-cc' !in args && '-prod' !in args && '-parallel-cc' !in args) {
 		// compiling by default, i.e. `v self`:
 		uos := os.user_os()
diff --git a/cmd/tools/vup.v b/cmd/tools/vup.v
index 6d1a37ec20ad0b..d64b233b63693b 100644
--- a/cmd/tools/vup.v
+++ b/cmd/tools/vup.v
@@ -18,14 +18,16 @@ struct App {
 	skip_current bool // skip the current hash check, enabling easier testing on the same commit, without using docker etc
 }
 
+const args = arguments()
+
 fn new_app() App {
 	return App{
-		is_verbose:   '-v' in os.args
-		is_prod:      '-prod' in os.args
+		is_verbose:   '-v' in args
+		is_prod:      '-prod' in args
 		vexe:         vexe
 		vroot:        vroot
-		skip_v_self:  '-skip_v_self' in os.args
-		skip_current: '-skip_current' in os.args
+		skip_v_self:  '-skip_v_self' in args
+		skip_current: '-skip_current' in args
 	}
 }
 
diff --git a/examples/fibonacci.v b/examples/fibonacci.v
index ddcabb872f39b1..35401ae1c2cd5b 100644
--- a/examples/fibonacci.v
+++ b/examples/fibonacci.v
@@ -1,23 +1,19 @@
 // This program displays the fibonacci sequence
-import os
+const args = arguments()
 
 fn main() {
 	// Check for user input
-	if os.args.len != 2 {
+	if args.len != 2 {
 		println('usage: fibonacci [rank]')
-
 		return
 	}
-
 	// Parse first argument and cast it to int
-
-	stop := os.args[1].int()
+	stop := args[1].int()
 	// Can only calculate correctly until rank 92
 	if stop > 92 {
 		println('rank must be 92 or less')
 		return
 	}
-
 	// Three consecutive terms of the sequence
 	mut a := i64(0)
 	mut b := i64(0)
@@ -29,7 +25,6 @@ fn main() {
 		b = c
 		// Compute the new term
 		c = a + b
-
 		// Print the new term
 		println(c)
 	}