diff --git a/README.markdown b/README.markdown
index 980ff2d3f..88c711642 100644
--- a/README.markdown
+++ b/README.markdown
@@ -152,7 +152,7 @@ lazy val app = (projectMatrix in file("app"))
 
 This will create `appConfig1_22_11`, `appConfig1_22_12`, and `appConfig1_32_12` respectively producing `app_config1.3_2.12`, `app_config1.2_2.11`, and `app_config1.2_2.12` artifacts.
 
-### referncing the generated subprojects
+### referencing the generated subprojects
 
 You might want to reference to one of the projects within `build.sbt`.
 
@@ -164,6 +164,29 @@ lazy val appConfig12_212 = app.finder(config13, VirtualAxis.jvm)("2.12.8")
 
 In the above `core12` returns `Project` type.
 
+### accessing axes from subprojects
+
+Each generated subproject can access the values for all the axes using `virtualAxes` key:
+
+```scala
+lazy val platformTest = settingKey[String]("")
+
+lazy val core = (projectMatrix in file("core"))
+  .settings(
+    name := "core"
+  )
+  .jsPlatform(scalaVersions = Seq("2.12.12", "2.11.12"))
+  .jvmPlatform(scalaVersion = Seq("2.12.12", "2.13.3"))
+  .settings(
+    platformTest := {
+      if(virtualAxes.value.contains(VirtualAxis.jvm))
+        "JVM project"
+      else
+        "JS project"
+    }
+  )
+```
+
 credits
 -------
 
diff --git a/src/main/scala/sbt/internal/ProjectMatrix.scala b/src/main/scala/sbt/internal/ProjectMatrix.scala
index d32acedae..9793b949d 100644
--- a/src/main/scala/sbt/internal/ProjectMatrix.scala
+++ b/src/main/scala/sbt/internal/ProjectMatrix.scala
@@ -8,6 +8,8 @@ import Keys._
 import scala.util.Try
 import sbt.internal.inc.ReflectUtilities
 
+import sbtprojectmatrix.ProjectMatrixKeys
+
 /**
  * A project matrix is an implementation of a composite project
  * that represents cross building across some axis (such as platform)
@@ -261,6 +263,7 @@ object ProjectMatrix {
             inConfig(Compile)(makeSources(nonScalaDirSuffix, svDirSuffix)),
             inConfig(Test)(makeSources(nonScalaDirSuffix, svDirSuffix)),
             projectDependencies := projectDependenciesTask.value,
+            ProjectMatrixKeys.virtualAxes := axes
           )
           .settings(self.settings)
           .configure(transforms: _*)
diff --git a/src/main/scala/sbtprojectmatrix/ProjectMatrixPlugin.scala b/src/main/scala/sbtprojectmatrix/ProjectMatrixPlugin.scala
index 5dc6ed229..701916bc7 100644
--- a/src/main/scala/sbtprojectmatrix/ProjectMatrixPlugin.scala
+++ b/src/main/scala/sbtprojectmatrix/ProjectMatrixPlugin.scala
@@ -5,10 +5,16 @@ import internal._
 import java.util.concurrent.atomic.AtomicBoolean
 import scala.language.experimental.macros
 
+trait ProjectMatrixKeys {
+    val virtualAxes = settingKey[Seq[VirtualAxis]]("Virtual axes for the project")
+}
+
+object ProjectMatrixKeys extends ProjectMatrixKeys
+
 object ProjectMatrixPlugin extends AutoPlugin {
   override val requires = sbt.plugins.CorePlugin
   override val trigger = allRequirements
-  object autoImport {
+  object autoImport extends ProjectMatrixKeys {
     def projectMatrix: ProjectMatrix = macro ProjectMatrix.projectMatrixMacroImpl
 
     implicit def matrixClasspathDependency[T](
diff --git a/src/sbt-test/projectMatrix/native/project/build.properties b/src/sbt-test/projectMatrix/native/project/build.properties
new file mode 100644
index 000000000..dc8f331cc
--- /dev/null
+++ b/src/sbt-test/projectMatrix/native/project/build.properties
@@ -0,0 +1 @@
+sbt.version = 1.4.3
diff --git a/src/sbt-test/projectMatrix/native/project/plugins.sbt b/src/sbt-test/projectMatrix/native/project/plugins.sbt
index 2efd7a57d..56be18345 100644
--- a/src/sbt-test/projectMatrix/native/project/plugins.sbt
+++ b/src/sbt-test/projectMatrix/native/project/plugins.sbt
@@ -3,4 +3,4 @@ sys.props.get("plugin.version") match {
   case _ => sys.error("""|The system property 'plugin.version' is not defined.
                          |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
 }
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.3.9")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.0-M2")
diff --git a/src/sbt-test/projectMatrix/projectAxes/build.sbt b/src/sbt-test/projectMatrix/projectAxes/build.sbt
new file mode 100644
index 000000000..d8abb39ce
--- /dev/null
+++ b/src/sbt-test/projectMatrix/projectAxes/build.sbt
@@ -0,0 +1,55 @@
+lazy val scala213 = "2.13.3"
+lazy val scala212 = "2.12.12"
+lazy val check = taskKey[Unit]("")
+lazy val platformTest = settingKey[String]("")
+lazy val configTest = settingKey[String]("")
+
+
+lazy val config12 = ConfigAxis("Config1_2", "config1.2")
+lazy val config13 = ConfigAxis("Config1_3", "config1.3")
+
+lazy val root = (project in file("."))
+  .aggregate((core.projectRefs ++ custom.projectRefs):_*)
+
+lazy val core = (projectMatrix in file("core"))
+  .settings(
+    check := {
+       assert(platformTest.value.endsWith("-platform"))
+    },
+  )
+  .jvmPlatform(scalaVersions = Seq(scala213, scala212))
+  .jsPlatform(scalaVersions = Seq(scala212))
+  .settings(platformSettings)
+
+lazy val custom =
+  (projectMatrix in file("custom"))
+  .customRow(
+    scalaVersions = Seq(scala212),
+    axisValues = Seq(config13, VirtualAxis.jvm),
+    _.settings()
+  )
+  .settings(platformSettings)
+  .settings(customSettings)
+  .settings(
+    check := {
+      assert(platformTest.value.endsWith("-platform"))
+      assert(configTest.value.startsWith("config for"))
+    }
+  )
+
+
+lazy val platformSettings = Seq[Def.Setting[_]](
+    platformTest := {
+      if(virtualAxes.value.contains(sbt.VirtualAxis.js)) "js-platform"
+      else if(virtualAxes.value.contains(sbt.VirtualAxis.jvm)) "jvm-platform"
+      else throw new RuntimeException(s"Something must be wrong (built-in platforms test) - virtualAxes value is ${virtualAxes.value}")
+    }
+)
+
+lazy val customSettings = Seq[Def.Setting[_]](
+  configTest := {
+    if(virtualAxes.value.contains(config12)) "config for 1.2"
+    else if (virtualAxes.value.contains(config13)) "config for 1.3"
+    else throw new RuntimeException(s"Something must be wrong (custom axis test ) - virtualAxes value is ${virtualAxes.value}")
+  }
+)
diff --git a/src/sbt-test/projectMatrix/projectAxes/project/ConfigAxis.scala b/src/sbt-test/projectMatrix/projectAxes/project/ConfigAxis.scala
new file mode 100644
index 000000000..bdabcb757
--- /dev/null
+++ b/src/sbt-test/projectMatrix/projectAxes/project/ConfigAxis.scala
@@ -0,0 +1,3 @@
+import sbt._
+
+case class ConfigAxis(idSuffix: String, directorySuffix: String) extends VirtualAxis.WeakAxis
diff --git a/src/sbt-test/projectMatrix/projectAxes/project/plugins.sbt b/src/sbt-test/projectMatrix/projectAxes/project/plugins.sbt
new file mode 100644
index 000000000..60a69f1df
--- /dev/null
+++ b/src/sbt-test/projectMatrix/projectAxes/project/plugins.sbt
@@ -0,0 +1,7 @@
+sys.props.get("plugin.version") match {
+  case Some(x) => addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % x)
+  case _ => sys.error("""|The system property 'plugin.version' is not defined.
+                         |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
+}
+
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.3.0")
diff --git a/src/sbt-test/projectMatrix/projectAxes/test b/src/sbt-test/projectMatrix/projectAxes/test
new file mode 100644
index 000000000..e3bd83da1
--- /dev/null
+++ b/src/sbt-test/projectMatrix/projectAxes/test
@@ -0,0 +1,2 @@
+> compile
+> check