diff --git a/toolflow/src/main/scala/com/minres/tgc/hammer/options/BaseOption.scala b/toolflow/src/main/scala/com/minres/tgc/hammer/options/BaseOption.scala
index 079c016..52fc601 100644
--- a/toolflow/src/main/scala/com/minres/tgc/hammer/options/BaseOption.scala
+++ b/toolflow/src/main/scala/com/minres/tgc/hammer/options/BaseOption.scala
@@ -15,7 +15,7 @@ trait BaseOption[T](using conv: ValueConverter[T]) extends ConfigElement {
   def get: T = scallop()
   def apply: T = get
 
-  def getToolParameters: Seq[Shellable] = if (scallop.isDefined) Seq(s"--$toolName", getToolArg) else Seq()
+  def getToolParameters: Seq[Shellable] = if (scallop.isDefined) Seq(s"$toolName", getToolArg) else Seq()
 
   def toolName: String
   def getToolArg: String = get.toString
diff --git a/toolflow/src/main/scala/com/minres/tgc/hammer/options/CommandGroup.scala b/toolflow/src/main/scala/com/minres/tgc/hammer/options/CommandGroup.scala
index f27552a..8075d34 100644
--- a/toolflow/src/main/scala/com/minres/tgc/hammer/options/CommandGroup.scala
+++ b/toolflow/src/main/scala/com/minres/tgc/hammer/options/CommandGroup.scala
@@ -5,8 +5,8 @@ import os.Shellable
 
 class CommandGroup(name: String) extends BaseGroup {
   override def getToolParameters: Seq[Shellable] = {
-    val sub = options.toSeq.map(_.getToolParameters)
-    Seq(s"""--$name="${sub.flatMap(_.value).mkString(" ")}"""")
+    val sub = options.toSeq.map(_.getToolParameters.map(_.value).mkString("="))
+    Seq(s"""$name="${sub.mkString(" ")}"""")
   }
 
   override def init(scallopConf: ScallopConf, group: ScallopOptionGroup): Unit = {
diff --git a/toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/SchedulingParameters.scala b/toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/SchedulingParameters.scala
index 933dfa9..5deb0c5 100644
--- a/toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/SchedulingParameters.scala
+++ b/toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/SchedulingParameters.scala
@@ -7,13 +7,13 @@ import org.rogach.scallop.*
 class SchedulingParameters extends OptionGroup {
   override def name: String = "Longnail Scheduling Args"
 
-  add(new CommandGroup("prepare-schedule-lil") {
+  add(new CommandGroup("--prepare-schedule-lil") {
     choiceS(Seq("LEGACY", "MS", "PAMS", "PARAMS", "MI_MS", "MI_PAMS", "MI_PARAMS"), name = "schedulingAlgo", default = Some("LEGACY"))
     value[Path](cliName = "cellLibrary", toolName = "library")
     valueS[Path](name = "opTyLibrary")
   })
 
-  add(new CommandGroup("schedule-lil") {
+  add(new CommandGroup("--schedule-lil") {
     valueS[Int](name = "schedulingTimeout")
     value[Int](cliName = "schedulingRefineTimeout", toolName = "schedRefineTimeout")
     value[Path](cliName = "schedulingKconf", toolName = "solSelKconfPath")
@@ -22,6 +22,6 @@ class SchedulingParameters extends OptionGroup {
     value[Int](cliName = "clockPeriod", toolName = "clockTime")
   })
 
-  value[Int](cliName = "maxLoopUnrollFactor", toolName = "max-unroll-factor")
-  value[Path](cliName = "schedulingMLIR", toolName = "o")
+  value[Int](cliName = "--maxLoopUnrollFactor", toolName = "max-unroll-factor")
+  value[Path](cliName = "--schedulingMLIR", toolName = "o")
 }