diff --git a/.build_register b/.build_register
index 832c192..d540e44 100644
--- a/.build_register
+++ b/.build_register
@@ -1 +1 @@
-1.11.0 17
+1.11.0 41
diff --git a/main.go b/main.go
index b382177..3c8cf0a 100644
--- a/main.go
+++ b/main.go
@@ -382,12 +382,16 @@ func isReaderTerminal(r io.Reader) bool {
 }
 
 func registerLocalFunctions(ctx expr.ExprContext) {
-	aboutFunc := func(ctx expr.ExprContext, name string, args []any) (result any, err error) {
+	const (
+		devParamProp = "prop"
+	)
+
+	aboutFunc := func(ctx expr.ExprContext, name string, args map[string]any) (result any, err error) {
 		result = about()
 		return
 	}
 
-	ctrlListFunc := func(ctx expr.ExprContext, name string, args []any) (result any, err error) {
+	ctrlListFunc := func(ctx expr.ExprContext, name string, args map[string]any) (result any, err error) {
 		vars := ctx.EnumVars(func(name string) bool {
 			return len(name) > 0 && name[0] == '_'
 		})
@@ -395,25 +399,25 @@ func registerLocalFunctions(ctx expr.ExprContext) {
 		return
 	}
 
-	ctrlFunc := func(ctx expr.ExprContext, name string, args []any) (result any, err error) {
-		varName, _ := args[0].(string)
+	ctrlFunc := func(ctx expr.ExprContext, name string, args map[string]any) (result any, err error) {
+		varName, _ := args[devParamProp].(string)
 		if len(args) == 1 {
 			result = expr.GlobalCtrlGet(varName)
 		} else {
-			result = expr.GlobalCtrlSet(varName, args[1])
+			result = expr.GlobalCtrlSet(varName, args[expr.ParamValue])
 		}
 		return
 	}
 
-	envSetFunc := func(ctx expr.ExprContext, name string, args []any) (result any, err error) {
+	envSetFunc := func(ctx expr.ExprContext, name string, args map[string]any) (result any, err error) {
 		var varName, value string
 		var ok bool
-		if varName, ok = args[0].(string); !ok {
-			err = expr.ErrExpectedGot(name, expr.TypeString, args[0])
+		if varName, ok = args[expr.ParamName].(string); !ok {
+			err = expr.ErrExpectedGot(name, expr.TypeString, args[expr.ParamName])
 			return
 		}
-		if value, ok = args[1].(string); !ok {
-			err = expr.ErrExpectedGot(name, expr.TypeString, args[1])
+		if value, ok = args[expr.ParamValue].(string); !ok {
+			err = expr.ErrExpectedGot(name, expr.TypeString, args[expr.ParamValue])
 			return
 		}
 		if err = os.Setenv(varName, value); err == nil {
@@ -422,11 +426,11 @@ func registerLocalFunctions(ctx expr.ExprContext) {
 		return
 	}
 
-	envGetFunc := func(ctx expr.ExprContext, name string, args []any) (result any, err error) {
+	envGetFunc := func(ctx expr.ExprContext, name string, args map[string]any) (result any, err error) {
 		var varName string
 		var ok bool
-		if varName, ok = args[0].(string); !ok {
-			err = expr.ErrExpectedGot(name, expr.TypeString, args[0])
+		if varName, ok = args[expr.ParamName].(string); !ok {
+			err = expr.ErrExpectedGot(name, expr.TypeString, args[expr.ParamName])
 			return
 		}
 
@@ -439,7 +443,7 @@ func registerLocalFunctions(ctx expr.ExprContext) {
 	ctx.RegisterFunc("about", expr.NewGolangFunctor(aboutFunc), expr.TypeString, []expr.ExprFuncParam{})
 	ctx.RegisterFunc("ctrlList", expr.NewGolangFunctor(ctrlListFunc), expr.TypeListOfStrings, []expr.ExprFuncParam{})
 	ctx.RegisterFunc("ctrl", expr.NewGolangFunctor(ctrlFunc), expr.TypeAny, []expr.ExprFuncParam{
-		expr.NewFuncParam("prop"),
+		expr.NewFuncParam(devParamProp),
 		expr.NewFuncParamFlag(expr.ParamValue, expr.PfOptional),
 	})
 	ctx.RegisterFunc("envSet", expr.NewGolangFunctor(envSetFunc), expr.TypeString, []expr.ExprFuncParam{