diff --git a/src/main/kotlin/com/beust/kobalt/BuildScript.kt b/src/main/kotlin/com/beust/kobalt/BuildScript.kt
index 53e4158e..b40718de 100644
--- a/src/main/kotlin/com/beust/kobalt/BuildScript.kt
+++ b/src/main/kotlin/com/beust/kobalt/BuildScript.kt
@@ -1,12 +1,11 @@
 package com.beust.kobalt
 
+import com.beust.kobalt.api.IClasspathDependency
 import com.beust.kobalt.api.Kobalt
-import com.beust.kobalt.api.Project
 import com.beust.kobalt.api.annotation.Directive
 import com.beust.kobalt.maven.DepFactory
-import com.beust.kobalt.api.IClasspathDependency
+import com.beust.kobalt.maven.dependency.FileDependency
 import com.beust.kobalt.misc.KobaltExecutors
-import com.beust.kobalt.SystemProperties
 import java.io.File
 
 @Directive
@@ -14,7 +13,7 @@ fun homeDir(vararg dirs: String) : String = SystemProperties.homeDir +
         File.separator + dirs.toArrayList().joinToString(File.separator)
 
 @Directive
-fun file(file: String) : String = IClasspathDependency.PREFIX_FILE + file
+fun file(file: String) : String = FileDependency.PREFIX_FILE + file
 
 @Directive
 fun plugins(vararg dependency : IClasspathDependency) {
diff --git a/src/main/kotlin/com/beust/kobalt/api/IClasspathDependency.kt b/src/main/kotlin/com/beust/kobalt/api/IClasspathDependency.kt
index 36db63b5..9ee3f4dc 100644
--- a/src/main/kotlin/com/beust/kobalt/api/IClasspathDependency.kt
+++ b/src/main/kotlin/com/beust/kobalt/api/IClasspathDependency.kt
@@ -10,10 +10,6 @@ import java.util.concurrent.Future
  * which represents a dependency living in a Maven repo.
  */
 interface IClasspathDependency {
-    companion object {
-        val PREFIX_FILE: String = "file://"
-    }
-
     /** Identifier for this dependency */
     val id: String
 
diff --git a/src/main/kotlin/com/beust/kobalt/maven/DepFactory.kt b/src/main/kotlin/com/beust/kobalt/maven/DepFactory.kt
index 17230e8c..210e08db 100644
--- a/src/main/kotlin/com/beust/kobalt/maven/DepFactory.kt
+++ b/src/main/kotlin/com/beust/kobalt/maven/DepFactory.kt
@@ -1,8 +1,8 @@
 package com.beust.kobalt.maven
 
 import com.beust.kobalt.KobaltException
-import com.beust.kobalt.maven.dependency.FileDependency
 import com.beust.kobalt.api.IClasspathDependency
+import com.beust.kobalt.maven.dependency.FileDependency
 import com.beust.kobalt.maven.dependency.MavenDependency
 import com.beust.kobalt.misc.KobaltExecutors
 import java.util.concurrent.ExecutorService
@@ -19,8 +19,8 @@ public class DepFactory @Inject constructor(val localRepo: LocalRepo,
      */
     public fun create(id: String, executor: ExecutorService,
             localFirst : Boolean = true) : IClasspathDependency {
-        if (id.startsWith(IClasspathDependency.PREFIX_FILE)) {
-            return FileDependency(id.substring(IClasspathDependency.PREFIX_FILE.length))
+        if (id.startsWith(FileDependency.PREFIX_FILE)) {
+            return FileDependency(id.substring(FileDependency.PREFIX_FILE.length))
         } else {
             val mavenId = MavenId(id)
             var version = mavenId.version
diff --git a/src/main/kotlin/com/beust/kobalt/maven/Kurl.kt b/src/main/kotlin/com/beust/kobalt/maven/Kurl.kt
index 17c06817..0d13b8b5 100644
--- a/src/main/kotlin/com/beust/kobalt/maven/Kurl.kt
+++ b/src/main/kotlin/com/beust/kobalt/maven/Kurl.kt
@@ -1,6 +1,6 @@
 package com.beust.kobalt.maven
 
-import com.beust.kobalt.api.IClasspathDependency
+import com.beust.kobalt.maven.dependency.FileDependency
 import com.google.inject.assistedinject.Assisted
 import java.io.*
 import java.net.HttpURLConnection
@@ -25,8 +25,8 @@ class Kurl @Inject constructor(@Assisted val url: String) {
             val result =
                     if (connection is HttpURLConnection) {
                         (connection as HttpURLConnection).responseCode == 200
-                    } else if (url.startsWith(IClasspathDependency.PREFIX_FILE)) {
-                        val fileName = url.substring(IClasspathDependency.PREFIX_FILE.length)
+                    } else if (url.startsWith(FileDependency.PREFIX_FILE)) {
+                        val fileName = url.substring(FileDependency.PREFIX_FILE.length)
                         File(fileName).exists()
                     } else {
                         false
diff --git a/src/main/kotlin/com/beust/kobalt/maven/dependency/FileDependency.kt b/src/main/kotlin/com/beust/kobalt/maven/dependency/FileDependency.kt
index 9bb0e077..368e37a4 100644
--- a/src/main/kotlin/com/beust/kobalt/maven/dependency/FileDependency.kt
+++ b/src/main/kotlin/com/beust/kobalt/maven/dependency/FileDependency.kt
@@ -6,7 +6,11 @@ import org.apache.maven.model.Dependency
 import java.io.File
 
 open public class FileDependency(open val fileName: String) : IClasspathDependency, Comparable<FileDependency> {
-    override val id = IClasspathDependency.PREFIX_FILE + fileName
+    companion object {
+        val PREFIX_FILE: String = "file://"
+    }
+
+    override val id = PREFIX_FILE + fileName
 
     override val jarFile = CompletedFuture(File(fileName))