diff --git a/build.go b/build.go
new file mode 100644
index 0000000..b44d59c
--- /dev/null
+++ b/build.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/evanw/esbuild/pkg/api"
+	"github.com/urfave/cli/v2"
+)
+
+func buildAction(ctx *cli.Context) error {
+	cfgPath := ctx.String("c")
+	os.Chdir(filepath.Dir(cfgPath))
+	opts := readCfg(cfgPath)
+
+	for _, o := range opts {
+		cp(o)
+
+		if ctx.Bool("p") {
+			o.ESBuild.MinifyIdentifiers = true
+			o.ESBuild.MinifySyntax = true
+			o.ESBuild.MinifyWhitespace = true
+			o.ESBuild.Sourcemap = api.SourceMapNone
+		}
+
+		api.Build(o.ESBuild)
+		replace(o)
+	}
+
+	return nil
+}
diff --git a/go.mod b/go.mod
index 850191d..d811731 100644
--- a/go.mod
+++ b/go.mod
@@ -12,10 +12,14 @@ require (
 )
 
 require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/smartystreets/goconvey v1.7.2 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.0 // indirect
+	github.com/urfave/cli/v2 v2.16.3 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 // indirect
 	gopkg.in/fsnotify.v1 v1.4.7 // indirect
 )
diff --git a/go.sum b/go.sum
index 837310f..6186fa0 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
+github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/evanw/esbuild v0.14.50 h1:h7sijkRPGB9ckpIOc6FMZ81/NMy/4g40LhsBAtPa3/I=
 github.com/evanw/esbuild v0.14.50/go.mod h1:dkwI35DCMf0iR+tJDiCEiPKZ4A+AotmmeLpPEv3dl9k=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
@@ -19,6 +21,8 @@ github.com/otiai10/mint v1.3.3 h1:7JgpsBaN0uMkyju4tbYHu0mnM55hNKVYLsXmwr15NQI=
 github.com/otiai10/mint v1.3.3/go.mod h1:/yxELlJQ0ufhjUwhshSj+wFjZ78CnZ48/1wtmBH1OTc=
 github.com/radovskyb/watcher v1.0.7 h1:AYePLih6dpmS32vlHfhCeli8127LzkIgwJGcwwe8tUE=
 github.com/radovskyb/watcher v1.0.7/go.mod h1:78okwvY5wPdzcb1UYnip1pvrZNIVEIh/Cm+ZuvsUYIg=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/smartystreets/assertions v1.2.0 h1:42S6lae5dvLc7BrLu/0ugRtcFVjoJNMC/N3yZFZkDFs=
 github.com/smartystreets/assertions v1.2.0/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo=
 github.com/smartystreets/goconvey v1.7.2 h1:9RBaZCeXEQ3UselpuwUQHltGVXvdwm6cv1hgR6gDIPg=
@@ -29,6 +33,10 @@ github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
 github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
 github.com/tidwall/pretty v1.2.0 h1:RWIZEg2iJ8/g6fDDYzMpobmaoGh5OLl4AXtGUGPcqCs=
 github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/urfave/cli/v2 v2.16.3 h1:gHoFIwpPjoyIMbJp/VFd+/vuD0dAgFK4B6DpEMFJfQk=
+github.com/urfave/cli/v2 v2.16.3/go.mod h1:1CNUng3PtjQMtRzJO4FMXBQvkGtuYRxxiR9xMa7jMwI=
+github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
+github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
diff --git a/linker.go b/linker.go
index 128ddee..03e74e2 100644
--- a/linker.go
+++ b/linker.go
@@ -32,10 +32,15 @@ func link(from, to string) chan struct{} {
 		name := gjson.Get(content, "name").String()
 
 		if deps[name] {
-			packages[name] = filepath.Dir(packageFiles[i])
+			pp, err := filepath.Abs(filepath.Dir(packageFiles[i]))
+			if err == nil {
+				packages[name] = pp
+			}
 		}
 	}
 
+	fmt.Printf("Found %d npm packages to monitor for changes.\n", len(packages))
+
 	go func() {
 		w := watcher.New()
 		w.SetMaxEvents(1)
diff --git a/main.go b/main.go
index 0c2a925..bf7d3c0 100644
--- a/main.go
+++ b/main.go
@@ -5,19 +5,13 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
-	"net/http"
 	"os"
-	"os/signal"
 	"path/filepath"
 	"strings"
-	"syscall"
-	"time"
 
 	"github.com/evanw/esbuild/pkg/api"
-	"github.com/goyek/goyek"
-	"github.com/jaschaephraim/lrserver"
 	"github.com/otiai10/copy"
-	"github.com/radovskyb/watcher"
+	"github.com/urfave/cli/v2"
 )
 
 var triggerReload = make(chan struct{})
@@ -73,160 +67,76 @@ func readCfg(cfgPath string) []options {
 }
 
 func main() {
-	flow := &goyek.Flow{}
+	cfgParam := &cli.StringFlag{
+		Name:  "c",
+		Value: "./.gowebbuild.json",
+		Usage: "path to config file config file.",
+	}
 
-	cfgPathParam := flow.RegisterStringParam(goyek.StringParam{
-		Name:    "c",
-		Usage:   "Path to config file config file.",
-		Default: "./.gowebbuild.json",
-	})
+	app := &cli.App{
+		Commands: []*cli.Command{
+			{
+				Name:  "build",
+				Usage: "build web sources one time and exit",
+				Flags: []cli.Flag{
+					cfgParam,
+					&cli.BoolFlag{
+						Name:  "p",
+						Value: false,
+						Usage: "use production ready build settings",
+					},
+				},
+				Action: buildAction,
+			},
 
-	prodParam := flow.RegisterBoolParam(goyek.BoolParam{
-		Name:    "p",
-		Usage:   "Use production ready build settings",
-		Default: false,
-	})
+			{
+				Name:  "watch",
+				Usage: "watch for changes and trigger the build",
+				Flags: []cli.Flag{
+					cfgParam,
+				},
+				Action: watchAction,
+			},
 
-	buildOnly := goyek.Task{
-		Name:   "build",
-		Usage:  "",
-		Params: goyek.Params{cfgPathParam, prodParam},
-		Action: func(tf *goyek.TF) {
-			cfgPath := cfgPathParam.Get(tf)
-			os.Chdir(filepath.Dir(cfgPath))
-			opts := readCfg(cfgPath)
+			{
+				Name:      "replace",
+				ArgsUsage: "[files] [search] [replace]",
+				Usage:     "replace text in files",
+				Action: func(ctx *cli.Context) error {
+					files := ctx.Args().Get(0)
+					searchStr := ctx.Args().Get(1)
+					replaceStr := ctx.Args().Get(2)
 
-			for _, o := range opts {
-				cp(o)
+					if files == "" {
+						return fmt.Errorf("invalid file pattern")
+					}
 
-				if prodParam.Get(tf) {
-					o.ESBuild.MinifyIdentifiers = true
-					o.ESBuild.MinifySyntax = true
-					o.ESBuild.MinifyWhitespace = true
-					o.ESBuild.Sourcemap = api.SourceMapNone
-				}
+					if searchStr == "" {
+						return fmt.Errorf("invalid search string")
+					}
 
-				api.Build(o.ESBuild)
-				replace(o)
-			}
+					replace(options{
+						Replace: []struct {
+							Pattern string
+							Search  string
+							Replace string
+						}{
+							{
+								Pattern: files,
+								Search:  searchStr,
+								Replace: replaceStr,
+							},
+						},
+					})
+					return nil
+				},
+			},
 		},
 	}
 
-	watch := goyek.Task{
-		Name:   "watch",
-		Usage:  "",
-		Params: goyek.Params{cfgPathParam},
-		Action: func(tf *goyek.TF) {
-			cfgPath := cfgPathParam.Get(tf)
-			os.Chdir(filepath.Dir(cfgPath))
-			optsSetups := readCfg(cfgPath)
-
-			c := make(chan os.Signal, 1)
-			signal.Notify(c, os.Interrupt, syscall.SIGTERM)
-
-			for i := range optsSetups {
-				opts := optsSetups[i]
-
-				go func(opts options) {
-					w := watcher.New()
-					w.SetMaxEvents(1)
-					w.FilterOps(watcher.Write, watcher.Rename, watcher.Move, watcher.Create, watcher.Remove)
-
-					if len(opts.Watch.Exclude) > 0 {
-						w.Ignore(opts.Watch.Exclude...)
-					}
-
-					if err := w.AddRecursive(opts.Watch.Path); err != nil {
-						fmt.Println(err.Error())
-						os.Exit(1)
-					}
-
-					go func() {
-						for {
-							select {
-							case event := <-w.Event:
-								fmt.Printf("File %s changed\n", event.Name())
-								cp(opts)
-								build(opts)
-								replace(opts)
-							case err := <-w.Error:
-								fmt.Println(err.Error())
-							case <-w.Closed:
-								return
-							}
-						}
-					}()
-
-					fmt.Printf("Watching %d elements in %s\n", len(w.WatchedFiles()), opts.Watch.Path)
-
-					cp(opts)
-					build(opts)
-					replace(opts)
-
-					if err := w.Start(time.Millisecond * 100); err != nil {
-						fmt.Println(err.Error())
-					}
-				}(opts)
-
-				if opts.Serve.Path != "" {
-					go func() {
-						port := 8888
-						if opts.Serve.Port != 0 {
-							port = opts.Serve.Port
-						}
-
-						http.Handle("/", http.FileServer(http.Dir(opts.Serve.Path)))
-
-						fmt.Printf("Serving contents of %s at :%d\n", opts.Serve.Path, port)
-						err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil)
-
-						if err != nil {
-							fmt.Printf("%+v\n", err.Error())
-							os.Exit(1)
-						}
-					}()
-				}
-
-				if opts.Link.From != "" {
-					reqBuildCh := link(opts.Link.From, opts.Link.To)
-
-					go func() {
-						for range reqBuildCh {
-							cp(opts)
-							build(opts)
-							replace(opts)
-						}
-					}()
-				}
-			}
-
-			go func() {
-				fmt.Println("Starting live reload server")
-				lr := lrserver.New(lrserver.DefaultName, lrserver.DefaultPort)
-
-				go func() {
-					for {
-						<-triggerReload
-						lr.Reload("")
-					}
-				}()
-
-				lr.SetStatusLog(nil)
-				err := lr.ListenAndServe()
-				if err != nil {
-					panic(err)
-				}
-			}()
-
-			<-c
-			fmt.Println("\nExit")
-			os.Exit(0)
-		},
+	if err := app.Run(os.Args); err != nil {
+		fmt.Println(err)
 	}
-
-	flow.DefaultTask = flow.Register(watch)
-	flow.Register(buildOnly)
-	flow.Main()
 }
 
 func cp(opts options) {
diff --git a/watch.go b/watch.go
new file mode 100644
index 0000000..2e2320a
--- /dev/null
+++ b/watch.go
@@ -0,0 +1,123 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"github.com/jaschaephraim/lrserver"
+	"github.com/radovskyb/watcher"
+	"github.com/urfave/cli/v2"
+)
+
+func watchAction(ctx *cli.Context) error {
+	cfgPath := ctx.String("c")
+	os.Chdir(filepath.Dir(cfgPath))
+	optsSetups := readCfg(cfgPath)
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+
+	for i := range optsSetups {
+		opts := optsSetups[i]
+
+		go func(opts options) {
+			w := watcher.New()
+			w.SetMaxEvents(1)
+			w.FilterOps(watcher.Write, watcher.Rename, watcher.Move, watcher.Create, watcher.Remove)
+
+			if len(opts.Watch.Exclude) > 0 {
+				w.Ignore(opts.Watch.Exclude...)
+			}
+
+			if err := w.AddRecursive(opts.Watch.Path); err != nil {
+				fmt.Println(err.Error())
+				os.Exit(1)
+			}
+
+			go func() {
+				for {
+					select {
+					case event := <-w.Event:
+						fmt.Printf("File %s changed\n", event.Name())
+						cp(opts)
+						build(opts)
+						replace(opts)
+					case err := <-w.Error:
+						fmt.Println(err.Error())
+					case <-w.Closed:
+						return
+					}
+				}
+			}()
+
+			fmt.Printf("Watching %d elements in %s\n", len(w.WatchedFiles()), opts.Watch.Path)
+
+			cp(opts)
+			build(opts)
+			replace(opts)
+
+			if err := w.Start(time.Millisecond * 100); err != nil {
+				fmt.Println(err.Error())
+			}
+		}(opts)
+
+		if opts.Serve.Path != "" {
+			go func() {
+				port := 8888
+				if opts.Serve.Port != 0 {
+					port = opts.Serve.Port
+				}
+
+				http.Handle("/", http.FileServer(http.Dir(opts.Serve.Path)))
+
+				fmt.Printf("Serving contents of %s at :%d\n", opts.Serve.Path, port)
+				err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil)
+
+				if err != nil {
+					fmt.Printf("%+v\n", err.Error())
+					os.Exit(1)
+				}
+			}()
+		}
+
+		if opts.Link.From != "" {
+			reqBuildCh := link(opts.Link.From, opts.Link.To)
+
+			go func() {
+				for range reqBuildCh {
+					cp(opts)
+					build(opts)
+					replace(opts)
+				}
+			}()
+		}
+	}
+
+	go func() {
+		fmt.Println("Starting live reload server")
+		lr := lrserver.New(lrserver.DefaultName, lrserver.DefaultPort)
+
+		go func() {
+			for {
+				<-triggerReload
+				lr.Reload("")
+			}
+		}()
+
+		lr.SetStatusLog(nil)
+		err := lr.ListenAndServe()
+		if err != nil {
+			panic(err)
+		}
+	}()
+
+	<-c
+	fmt.Println("\nStopped watching")
+
+	return nil
+}