diff --git a/build.sc b/build.sc
index 486f542..9510672 100644
--- a/build.sc
+++ b/build.sc
@@ -268,7 +268,8 @@ class AlmondSpark(val crossScalaVersion: String) extends CrossSbtModule with Amm
     core()
   )
   def ivyDeps = super.ivyDeps() ++ Agg(
-    Deps.jsoniterScalaCore
+    Deps.jsoniterScalaCore,
+    Deps.scalatags
   )
   def compileIvyDeps = super.compileIvyDeps() ++ Agg(
     Deps.ammoniteReplApi,
@@ -277,7 +278,6 @@ class AlmondSpark(val crossScalaVersion: String) extends CrossSbtModule with Amm
     Deps.scalaKernelApi
       .exclude(("com.lihaoyi", s"ammonite-compiler_$crossScalaVersion"))
       .exclude(("com.lihaoyi", s"ammonite-repl-api_$crossScalaVersion")),
-    Deps.scalatags,
     Deps.sparkSql(scalaVersion())
   )
   def repositoriesTask = T.task {
diff --git a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/Id.scala b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/Id.scala
new file mode 100644
index 0000000..92c65c6
--- /dev/null
+++ b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/Id.scala
@@ -0,0 +1,21 @@
+package org.apache.spark.sql.almondinternals
+
+import java.util.concurrent.atomic.AtomicInteger
+import java.util.{Locale, UUID}
+
+object Id {
+
+  def generate(): String =
+    if (useRandomIds)
+      UUID.randomUUID().toString
+    else
+      idCount.incrementAndGet().toString
+
+  private lazy val useRandomIds: Boolean =
+    Option(System.getenv("ALMOND_USE_RANDOM_IDS"))
+      .orElse(sys.props.get("almond.ids.random"))
+      .forall(s => s == "1" || s.toLowerCase(Locale.ROOT) == "true")
+
+  private val idCount = new AtomicInteger(222222)
+
+}
diff --git a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/ProgressSparkListener.scala b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/ProgressSparkListener.scala
index f01ccae..9cb27e1 100644
--- a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/ProgressSparkListener.scala
+++ b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/ProgressSparkListener.scala
@@ -1,6 +1,5 @@
 package org.apache.spark.sql.almondinternals
 
-import java.util.UUID
 import java.util.concurrent.atomic.AtomicInteger
 import java.util.concurrent.{
   ConcurrentHashMap,
@@ -29,7 +28,7 @@ final class ProgressSparkListener(
 
   private val elems = new ConcurrentHashMap[Int, StageElem]
 
-  private val commTargetName = s"cancel-stage-${UUID.randomUUID()}"
+  private val commTargetName = s"cancel-stage-${Id.generate()}"
 
   private var sentInitCode = false
 
diff --git a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/SendLog.scala b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/SendLog.scala
index eb1cae7..7154d50 100644
--- a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/SendLog.scala
+++ b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/SendLog.scala
@@ -2,7 +2,6 @@ package org.apache.spark.sql.almondinternals
 
 import java.io.{BufferedReader, File, FileReader}
 import java.nio.file.{Files, StandardOpenOption}
-import java.util.UUID
 
 import almond.interpreter.api.{CommHandler, CommTarget, DisplayData, OutputHandler}
 
@@ -27,8 +26,8 @@ final class SendLog(
 
   assert(backOffFactor >= 1.0)
 
-  private val commTarget = UUID.randomUUID().toString
-  private val commId     = UUID.randomUUID().toString
+  private val commTarget = Id.generate()
+  private val commId     = Id.generate()
 
   @volatile private var gotAck      = false
   @volatile private var keepReading = true
@@ -194,7 +193,7 @@ object SendLog {
 
     lazy val sendLog = new SendLog(f, commHandler, prefix = Option(prefix))
 
-    val id = UUID.randomUUID().toString
+    val id = Id.generate()
     val data = DisplayData(
       Map(DisplayData.ContentType.text -> "", DisplayData.ContentType.html -> ""),
       idOpt = Some(id)
diff --git a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/StageElem.scala b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/StageElem.scala
index 37ecc59..2cc866f 100644
--- a/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/StageElem.scala
+++ b/modules/almond-spark/src/main/scala/org/apache/spark/sql/almondinternals/StageElem.scala
@@ -4,7 +4,6 @@ import almond.interpreter.api.OutputHandler
 
 import java.util.concurrent.ThreadFactory
 import java.util.concurrent.ScheduledThreadPoolExecutor
-import java.util.UUID
 import java.util.concurrent.atomic.AtomicInteger
 
 import scala.concurrent.duration.DurationInt
@@ -25,7 +24,7 @@ final class StageElem(
     else s"<code>${name.take(idx)}</code> at <code>${name.drop(idx + sep.length)}</code>"
   }
 
-  val displayId      = s"stage-info-${UUID.randomUUID()}"
+  val displayId      = s"stage-info-${Id.generate()}"
   val titleDisplayId = s"$displayId-title"
 
   val startedTasks = new AtomicInteger
diff --git a/modules/almond-toree-spark/src/main/scala/almond/spark/ToreeSql.scala b/modules/almond-toree-spark/src/main/scala/almond/spark/ToreeSql.scala
index c38f843..e1b2724 100644
--- a/modules/almond-toree-spark/src/main/scala/almond/spark/ToreeSql.scala
+++ b/modules/almond-toree-spark/src/main/scala/almond/spark/ToreeSql.scala
@@ -6,7 +6,7 @@ object ToreeSql {
 
   private def sqlMagic(content: String): String = {
     val tq = "\"\"\""
-    s"""_root_.almond.display.Html(_root_.almond.dfrenderer.AlmondDataFrameRenderer.render(spark.sql($tq$content$tq), limit = $sqlLimit))"""
+    s"""_root_.almond.display.Html(_root_.almond.spark.DataFrameRenderer.render(spark.sql($tq$content$tq), limit = $sqlLimit))"""
   }
 
   def setup(): Unit = {