diff --git a/build.sbt b/build.sbt
index d6481a771..065e68569 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,3 +1,5 @@
 seq(lsSettings :_*)
 
-CrossBuilding.crossSbtVersions := Seq("0.11.1", "0.11.2", "0.11.3", "0.12")
\ No newline at end of file
+CrossBuilding.crossSbtVersions := Seq("0.11.1", "0.11.2", "0.11.3", "0.12")
+
+CrossBuilding.scriptedSettings
diff --git a/src/main/scala-sbt-0.11/net/virtualvoid/sbt/graph/Compat.scala b/src/main/scala-sbt-0.11/net/virtualvoid/sbt/graph/Compat.scala
new file mode 100644
index 000000000..d34e555f6
--- /dev/null
+++ b/src/main/scala-sbt-0.11/net/virtualvoid/sbt/graph/Compat.scala
@@ -0,0 +1,20 @@
+package net.virtualvoid.sbt.graph
+
+import sbt._
+import Keys._
+
+import Plugin.ignoreMissingUpdate
+
+object Compat {
+  /**
+   * This is copied directly from sbt/main/Defaults.java and then changed to update the UpdateConfiguration
+   * to ignore missing artifacts.
+   */
+  def ignoreMissingUpdateT =
+    ignoreMissingUpdate <<= (ivyModule, thisProjectRef, updateConfiguration, cacheDirectory, scalaInstance, transitiveUpdate, streams) map { (module, ref, config, cacheDirectory, si, reports, s) =>
+			val depsUpdated = reports.exists(!_.stats.cached)
+      val missingOkConfig = new UpdateConfiguration(config.retrieve, true, config.logging)
+
+			Classpaths.cachedUpdate(cacheDirectory / "update", Project.display(ref), module, missingOkConfig, Some(si), depsUpdated, s.log)
+		}
+}
\ No newline at end of file
diff --git a/src/main/scala-sbt-0.12/net/virtualvoid/sbt/graph/Compat.scala b/src/main/scala-sbt-0.12/net/virtualvoid/sbt/graph/Compat.scala
new file mode 100644
index 000000000..5bc770217
--- /dev/null
+++ b/src/main/scala-sbt-0.12/net/virtualvoid/sbt/graph/Compat.scala
@@ -0,0 +1,22 @@
+package net.virtualvoid.sbt.graph
+
+import sbt._
+import Keys._
+
+import Plugin.ignoreMissingUpdate
+
+object Compat {
+  /**
+   * This is copied directly from sbt/main/Defaults.java and then changed to update the UpdateConfiguration
+   * to ignore missing artifacts.
+   */
+  def ignoreMissingUpdateT =
+    ignoreMissingUpdate <<= (ivyModule, thisProjectRef, updateConfiguration, cacheDirectory, scalaInstance, transitiveUpdate, executionRoots, resolvedScoped, skip in update, streams) map {
+			(module, ref, config, cacheDirectory, si, reports, roots, resolved, skip, s) =>
+				val depsUpdated = reports.exists(!_.stats.cached)
+				val isRoot = roots contains resolved
+        val missingOkConfig = new UpdateConfiguration(config.retrieve, true, config.logging)
+
+				Classpaths.cachedUpdate(cacheDirectory / "update", Project.display(ref), module, missingOkConfig, Some(si), skip = skip, force = isRoot, depsUpdated = depsUpdated, log = s.log)
+		} tag(Tags.Update, Tags.Network)
+}
\ No newline at end of file
diff --git a/src/main/scala/net/virtualvoid/sbt/graph/IvyGraphMLDependencies.scala b/src/main/scala/net/virtualvoid/sbt/graph/IvyGraphMLDependencies.scala
index cecb82785..526a02ac5 100644
--- a/src/main/scala/net/virtualvoid/sbt/graph/IvyGraphMLDependencies.scala
+++ b/src/main/scala/net/virtualvoid/sbt/graph/IvyGraphMLDependencies.scala
@@ -25,7 +25,7 @@ import sbt.Graph
 import xml.{Document, XML, Node}
 
 object IvyGraphMLDependencies extends App {
-  case class Module(organisation: String, name: String, version: String) {
+  case class Module(organisation: String, name: String, version: String, error: Option[String] = None) {
     def id: String = organisation+":"+name+":"+version
   }
 
@@ -36,7 +36,7 @@ object IvyGraphMLDependencies extends App {
       mod <- doc \ "dependencies" \ "module"
       caller <- mod \ "revision" \ "caller"
       callerModule = nodeFromElement(caller, caller.attribute("callerrev").get.text)
-      depModule = nodeFromElement(mod, caller.attribute("rev").get.text)
+      depModule = nodeFromElement(mod, caller.attribute("rev").get.text, (mod \ "revision").head.attribute("error").map(_.text))
     } yield (callerModule, depModule)
 
     val nodes = edges.flatMap(e => Seq(e._1, e._2)).distinct
@@ -57,7 +57,7 @@ object IvyGraphMLDependencies extends App {
     // there should only be one root node (the project itself)
     val roots = nodes.filter(n => !edges.exists(_._2 == n)).sortBy(_.id)
     roots.map(root =>
-      Graph.toAscii[Module](root, node => deps.getOrElse(node.id, Seq.empty[Module]), _.id)
+      Graph.toAscii[Module](root, node => deps.getOrElse(node.id, Seq.empty[Module]), x => x.id + x.error.map(" (error: "+_+")").getOrElse(""))
     ).mkString("\n")
   }
 
@@ -93,8 +93,8 @@ object IvyGraphMLDependencies extends App {
 
     XML.save(outputFile, xml)
   }
-  private def nodeFromElement(element: Node, version: String): Module =
-    Module(element.attribute("organisation").get.text, element.attribute("name").get.text, version)
+  private def nodeFromElement(element: Node, version: String, error: Option[String] = None): Module =
+    Module(element.attribute("organisation").get.text, element.attribute("name").get.text, version, error)
 
   private def buildDoc(ivyReportFile: String) = ConstructingParser.fromSource(io.Source.fromFile(ivyReportFile), false).document
 
diff --git a/src/main/scala/net/virtualvoid/sbt/graph/Plugin.scala b/src/main/scala/net/virtualvoid/sbt/graph/Plugin.scala
index fa9286e1c..fc37bc7fa 100755
--- a/src/main/scala/net/virtualvoid/sbt/graph/Plugin.scala
+++ b/src/main/scala/net/virtualvoid/sbt/graph/Plugin.scala
@@ -33,6 +33,8 @@ object Plugin extends sbt.Plugin {
     "A function which returns the file containing the ivy report from the ivy cache for a given configuration")
   val ivyReport = TaskKey[File]("ivy-report",
     "A task which returns the location of the ivy report file for a given configuration (default `compile`).")
+  val ignoreMissingUpdate = TaskKey[UpdateReport]("update-ignore-missing",
+    "A copy of the update task which ignores missing artifacts")
 
   def graphSettings = seq(
     ivyReportFunction <<= (sbtVersion, target, projectID, ivyModule, appConfiguration, streams) map { (sbtV, target, projectID, ivyModule, config, streams) =>
@@ -50,11 +52,12 @@ object Plugin extends sbt.Plugin {
   ) ++ Seq(Compile, Test, Runtime, Provided, Optional).flatMap(ivyReportForConfig)
 
   def ivyReportForConfig(config: Configuration) = inConfig(config)(seq(
-    ivyReport <<= ivyReportFunction map (_(config.toString)) dependsOn(update),
+    ivyReport <<= ivyReportFunction map (_(config.toString)) dependsOn(ignoreMissingUpdate),
     asciiGraph <<= asciiGraphTask,
     dependencyGraph <<= printAsciiGraphTask,
     dependencyGraphMLFile <<= target / "dependencies-%s.graphml".format(config.toString),
-    dependencyGraphML <<= dependencyGraphMLTask
+    dependencyGraphML <<= dependencyGraphMLTask,
+    Compat.ignoreMissingUpdateT
   ))
 
   def asciiGraphTask = (ivyReport) map { report =>
diff --git a/src/sbt-test/sbt-dependency-graph/showMissingUpdates/build.sbt b/src/sbt-test/sbt-dependency-graph/showMissingUpdates/build.sbt
new file mode 100644
index 000000000..f610bcf02
--- /dev/null
+++ b/src/sbt-test/sbt-dependency-graph/showMissingUpdates/build.sbt
@@ -0,0 +1,19 @@
+import net.virtualvoid.sbt.graph.Plugin._
+
+graphSettings
+
+scalaVersion := "2.9.2"
+
+libraryDependencies +=
+  "at.blub" % "blib" % "1.2.3" % "test"
+
+TaskKey[Unit]("check") <<= (ivyReport in Test, asciiGraph in Test) map { (report, graph) =>
+  def sanitize(str: String): String = str.split('\n').drop(1).mkString("\n")
+  val expectedGraph =
+    """default:default-91180e_2.9.2:0.1-SNAPSHOT
+      |  +-at.blub:blib:1.2.3 (error: not found)
+      |  +-org.scala-lang:scala-library:2.9.2
+      |  """.stripMargin
+  require(sanitize(graph) == sanitize(expectedGraph), "Graph for report %s was '\n%s' but should have been '\n%s'" format (report, sanitize(graph), sanitize(expectedGraph)))
+  ()
+}
diff --git a/src/sbt-test/sbt-dependency-graph/showMissingUpdates/project/plugins.sbt b/src/sbt-test/sbt-dependency-graph/showMissingUpdates/project/plugins.sbt
new file mode 100644
index 000000000..08b3f3d0a
--- /dev/null
+++ b/src/sbt-test/sbt-dependency-graph/showMissingUpdates/project/plugins.sbt
@@ -0,0 +1 @@
+addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.6.1-SNAPSHOT")
\ No newline at end of file
diff --git a/src/sbt-test/sbt-dependency-graph/showMissingUpdates/test b/src/sbt-test/sbt-dependency-graph/showMissingUpdates/test
new file mode 100644
index 000000000..a5912a391
--- /dev/null
+++ b/src/sbt-test/sbt-dependency-graph/showMissingUpdates/test
@@ -0,0 +1 @@
+> check
\ No newline at end of file