diff --git a/addon/task.go b/addon/task.go
index bf9649e41..c31fc5dce 100644
--- a/addon/task.go
+++ b/addon/task.go
@@ -271,31 +271,34 @@ func (h *Task) pushReport() {
 	return
 }
 
+var (
+	EnvRegex = regexp.MustCompile(`(\${)([^}]+)(})`)
+)
+
 // EnvInjector inject ENVAR into extension metadata.
 type EnvInjector struct {
 }
 
 // Inject inject ENVAR into extension metadata.
 func (r *EnvInjector) Inject(extensions []api.Extension) {
-	p := regexp.MustCompile(`(\${)([^}]+)(})`)
 	for i := range extensions {
 		extension := &extensions[i]
 		mp := make(map[string]any)
 		b, _ := json.Marshal(extension.Metadata)
 		_ = json.Unmarshal(b, &mp)
-		r.inject(p, mp)
+		r.inject(mp)
 	}
 }
 
 // inject ENVAR into extension metadata.
-func (r *EnvInjector) inject(p *regexp.Regexp, mp map[string]any) {
+func (r *EnvInjector) inject(mp map[string]any) {
 	for k, v := range mp {
 		switch node := v.(type) {
 		case map[string]any:
-			r.inject(p, node)
+			r.inject(node)
 		case string:
 			for {
-				match := p.FindStringSubmatch(node)
+				match := EnvRegex.FindStringSubmatch(node)
 				if len(match) < 3 {
 					break
 				}
diff --git a/task/injector.go b/task/injector.go
index 82a42646d..1213d03aa 100644
--- a/task/injector.go
+++ b/task/injector.go
@@ -5,7 +5,11 @@ import (
 	"strconv"
 	"strings"
 
-	crd "github.com/konveyor/tackle2-hub/k8s/api/tackle/v1alpha1"
+	core "k8s.io/api/core/v1"
+)
+
+var (
+	PortRegex = regexp.MustCompile(`(\$\(port:)([0-9]+)\)`)
 )
 
 // Injector macro processor.
@@ -14,65 +18,37 @@ type Injector struct {
 }
 
 // Inject process macros.
-func (r *Injector) Inject(extension *crd.Extension) {
-	container := &extension.Spec.Container
+func (r *Injector) Inject(container *core.Container) {
 	for _, env := range container.Env {
 		env.Value = r.port.inject(env.Value)
 	}
-	r.port.next()
-}
-
-// Port port allocation.
-type Port struct {
-	next    int
-	matched int
 }
 
 // PortInjector provides $(port:<base>) injection.
 type PortInjector struct {
-	pattern *regexp.Regexp
-	portMap map[int]Port
-}
-
-// init object.
-func (r *PortInjector) init() {
-	if r.pattern != nil {
-		return
-	}
-	r.pattern = regexp.MustCompile(`(\$\(port:)([0-9]+)\)`)
-	r.portMap = make(map[int]Port)
+	portMap map[int]int
 }
 
 // inject port.
 func (r *PortInjector) inject(in string) (out string) {
-	r.init()
+	if r.portMap == nil {
+		r.portMap = make(map[int]int)
+	}
 	out = in
 	for {
-		match := r.pattern.FindStringSubmatch(out)
+		match := PortRegex.FindStringSubmatch(out)
 		if len(match) < 3 {
 			break
 		}
 		base, _ := strconv.Atoi(match[2])
-		port := r.portMap[base]
+		offset := r.portMap[base]
 		out = strings.Replace(
 			out,
 			match[0],
-			strconv.Itoa(base+port.next),
+			strconv.Itoa(base+offset),
 			-1)
-		port.matched++
-		r.portMap[base] = port
+		offset++
+		r.portMap[base] = offset
 	}
 	return
 }
-
-// next increment offsets and reset matched.
-func (r *PortInjector) next() {
-	r.init()
-	for base, port := range r.portMap {
-		if port.matched > 0 {
-			port.matched = 0
-			port.next++
-			r.portMap[base] = port
-		}
-	}
-}
diff --git a/task/manager.go b/task/manager.go
index bcf01d7d8..e137fea65 100644
--- a/task/manager.go
+++ b/task/manager.go
@@ -896,18 +896,18 @@ func (r *Task) containers(
 			},
 		},
 	}
-	injector := Injector{}
 	plain = append(plain, addon.Spec.Container)
 	for i := range extensions {
 		extension := &extensions[i]
-		injector.Inject(extension)
 		container := extension.Spec.Container
 		plain = append(
 			plain,
 			container)
 	}
+	injector := Injector{}
 	for i := range plain {
 		container := &plain[i]
+		injector.Inject(container)
 		container.SecurityContext = &core.SecurityContext{
 			RunAsUser: &userid,
 		}