diff --git a/internal/buildfile/reader.go b/internal/buildfile/reader.go
index 7a9f486..7ec2a60 100644
--- a/internal/buildfile/reader.go
+++ b/internal/buildfile/reader.go
@@ -8,6 +8,7 @@ import (
 	"git.xdrm.io/go/nix-amer/internal/instruction"
 	"io"
 	"strings"
+	"time"
 )
 
 // ErrNullContext is raised when the given context is nil
@@ -84,19 +85,21 @@ func (r *Reader) Execute() error {
 
 	// 3. exec each instruction
 	for i, inst := range r.Content {
-		clifmt.Align(fmt.Sprintf("(%d) %s", i, clifmt.Color(34, inst.Raw())))
-		fmt.Printf("%s", clifmt.Color(33, "running"))
+		clifmt.Align(fmt.Sprintf("(%d) %s", i, clifmt.Color(0, inst.Raw())))
+		fmt.Printf("%s", clifmt.Color(33, "processing"))
+
+		start := time.Now()
 
 		_, err := inst.Exec(*r.Context)
 		if err != nil {
 			fmt.Printf("\r")
-			clifmt.Align(fmt.Sprintf("(%d) %s", i, clifmt.Color(34, inst.Raw())))
-			fmt.Printf("%s      \n", clifmt.Color(31, err.Error()))
+			clifmt.Align(fmt.Sprintf("(%d) %s", i, clifmt.Color(0, inst.Raw())))
+			fmt.Printf("%s          \n", clifmt.Color(31, err.Error()))
 			continue
 		} else {
 			fmt.Printf("\r")
 			clifmt.Align(fmt.Sprintf("(%d) %s", i, clifmt.Color(34, inst.Raw())))
-			fmt.Printf("%s      \n", clifmt.Color(32, "done"))
+			fmt.Printf("%ss         \n", clifmt.Color(32, fmt.Sprintf("%.2f", time.Now().Sub(start).Seconds())))
 		}
 	}
 
diff --git a/internal/instruction/common.go b/internal/instruction/common.go
index 7106edd..efb63b1 100644
--- a/internal/instruction/common.go
+++ b/internal/instruction/common.go
@@ -17,21 +17,18 @@ type T interface {
 	Exec(ExecutionContext) ([]byte, error)
 }
 
-// Executor is the common interface to execute commands
-type Executor interface {
-	Execute(...string) error
-}
-
 // ExecutionContext contains system-specific drivers to manage the host
 type ExecutionContext struct {
-	ExecContext    Executor
 	PackageManager pkg.PackageManager
 	ServiceManager ser.ServiceManager
+	Executor       exec.Executor
+	Alias          map[string]string
 }
 
 // CreateContext creates an execution contet with the given package-manager and service-manager
 // default values are taken from each go package (pkg, ser)
-func CreateContext(_pkg, _ser string) (*ExecutionContext, error) {
+// if _exec is set, it will override the default (os) executor
+func CreateContext(_pkg, _ser string, _exec ...exec.Executor) (*ExecutionContext, error) {
 
 	// 1. fail if no value and no defaults
 	if len(_pkg)+len(pkg.DefaultManager) < 1 {
@@ -49,9 +46,14 @@ func CreateContext(_pkg, _ser string) (*ExecutionContext, error) {
 		_ser = ser.DefaultManager
 	}
 
-	executor := new(exec.Default)
+	var executor exec.Executor = new(exec.Default)
 
-	// 3. load managers
+	// 3. load custom executor (optional)
+	if len(_exec) > 0 && _exec[0] != nil {
+		executor = _exec[0]
+	}
+
+	// 4. load managers
 	pkg, err := pkg.Load(_pkg, executor)
 	if err != nil {
 		return nil, fmt.Errorf("package manager: %s", err)
@@ -65,6 +67,8 @@ func CreateContext(_pkg, _ser string) (*ExecutionContext, error) {
 	return &ExecutionContext{
 		PackageManager: pkg,
 		ServiceManager: ser,
+		Executor:       executor,
+		Alias:          make(map[string]string),
 	}, nil
 
 }
diff --git a/internal/instruction/delete.go b/internal/instruction/delete.go
index 646d578..fe4dfdf 100644
--- a/internal/instruction/delete.go
+++ b/internal/instruction/delete.go
@@ -10,7 +10,7 @@ type delete struct {
 	Packages []string
 }
 
-func (d *delete) Raw() string { return d.raw }
+func (d *delete) Raw() string { return strings.Join([]string{"delete", d.raw}, " ") }
 
 func (d *delete) Build(_args string) error {
 	d.Packages = strings.Split(_args, " ")
diff --git a/internal/instruction/install.go b/internal/instruction/install.go
index 368a71e..958e54a 100644
--- a/internal/instruction/install.go
+++ b/internal/instruction/install.go
@@ -10,7 +10,7 @@ type install struct {
 	Packages []string
 }
 
-func (d *install) Raw() string { return d.raw }
+func (d *install) Raw() string { return strings.Join([]string{"install", d.raw}, " ") }
 
 func (d *install) Build(_args string) error {
 	d.Packages = strings.Split(_args, " ")
diff --git a/internal/instruction/reader.go b/internal/instruction/reader.go
index e7ca520..958ca1a 100644
--- a/internal/instruction/reader.go
+++ b/internal/instruction/reader.go
@@ -32,6 +32,10 @@ func Parse(raw string) (T, error) {
 		i := &service{}
 		err := i.Build(split[1])
 		return i, err
+	case "run":
+		i := &run{}
+		err := i.Build(split[1])
+		return i, err
 	case "set":
 		i := &set{}
 		err := i.Build(split[1])
diff --git a/internal/instruction/run.go b/internal/instruction/run.go
new file mode 100644
index 0000000..c19df98
--- /dev/null
+++ b/internal/instruction/run.go
@@ -0,0 +1,34 @@
+package instruction
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+type run struct {
+	raw string
+}
+
+func (d *run) Raw() string { return strings.Join([]string{"run", d.raw}, " ") }
+
+func (d *run) Build(_args string) error {
+	d.raw = _args
+	return nil
+}
+
+func (d run) Exec(ctx ExecutionContext) ([]byte, error) {
+
+	// 1. fail if file not found
+	if _, err := os.Stat(d.raw); os.IsNotExist(err) {
+		return nil, fmt.Errorf("cannot find script '%s'", d.raw)
+	}
+
+	// 2. execute script
+	if err := ctx.Executor.Command(d.raw).Run(); err != nil {
+		return nil, fmt.Errorf("cannot run '%s' | %s", d.raw, err)
+	}
+
+	return nil, nil
+
+}
diff --git a/internal/instruction/service.go b/internal/instruction/service.go
index 791a93c..76d6305 100644
--- a/internal/instruction/service.go
+++ b/internal/instruction/service.go
@@ -13,7 +13,7 @@ type service struct {
 	Services []string
 }
 
-func (d *service) Raw() string { return d.raw }
+func (d *service) Raw() string { return strings.Join([]string{"service", d.raw}, " ") }
 
 func (d *service) Build(_args string) error {
 
diff --git a/internal/instruction/set.go b/internal/instruction/set.go
index 3cbf966..48650f0 100644
--- a/internal/instruction/set.go
+++ b/internal/instruction/set.go
@@ -23,7 +23,7 @@ type set struct {
 	Format *cnf.ConfigurationFormat
 }
 
-func (d *set) Raw() string { return d.raw }
+func (d *set) Raw() string { return strings.Join([]string{"set", d.raw}, " ") }
 
 func (d *set) Build(_args string) error {
 
diff --git a/main.go b/main.go
index 0e5c723..5dbbb89 100644
--- a/main.go
+++ b/main.go
@@ -5,10 +5,13 @@ import (
 	"git.xdrm.io/go/nix-amer/internal/buildfile"
 	"git.xdrm.io/go/nix-amer/internal/clifmt"
 	"os"
+	"time"
 )
 
 func main() {
 
+	start := time.Now()
+
 	// Manage arguments
 	ctx, bf, dryRun, err := GetArgs()
 	if err != nil {
@@ -40,14 +43,14 @@ func main() {
 	}
 
 	// 3. Execute
-	clifmt.Align("execution")
-	fmt.Printf("start\n")
+	fmt.Printf("------\n")
 	err = instructions.Execute()
 	if err != nil {
 		fmt.Printf("%s\n", clifmt.Warn(err.Error()))
 		return
 	}
-	clifmt.Align("execution")
-	fmt.Printf("%s\n", clifmt.Color(32, "finished"))
+	fmt.Printf("------\n")
+	clifmt.Align("finished in")
+	fmt.Printf("%ss\n", clifmt.Color(32, fmt.Sprintf("%.2f", time.Now().Sub(start).Seconds())))
 
 }