diff --git a/xtext-gradle-plugin/src/main/java/org/xtext/gradle/tasks/XtextEclipseSettings.xtend b/xtext-gradle-plugin/src/main/java/org/xtext/gradle/tasks/XtextEclipseSettings.xtend
index 47ac2dcd..035902dd 100644
--- a/xtext-gradle-plugin/src/main/java/org/xtext/gradle/tasks/XtextEclipseSettings.xtend
+++ b/xtext-gradle-plugin/src/main/java/org/xtext/gradle/tasks/XtextEclipseSettings.xtend
@@ -1,5 +1,7 @@
 package org.xtext.gradle.tasks;
 
+import com.google.common.base.CharMatcher
+import java.io.File
 import org.gradle.api.DefaultTask
 import org.gradle.api.tasks.TaskAction
 
@@ -18,11 +20,19 @@ class XtextEclipseSettings extends DefaultTask {
 			prefs.load
 			prefs.putBoolean("is_project_specific", true)
 			language.outputs.forEach [ output |
-				prefs.put(output.getKey("directory"), project.file(output.dir).absolutePath)
+				prefs.put(output.getKey("directory"), project.file(output.dir).projectRelativePath)
 			]
 			prefs.save
 		]
 	}
 
 	def String getKey(OutputConfiguration output, String preferenceName) '''outlet.«output.name».«preferenceName»'''
+	
+	private def projectRelativePath(File file) {
+		project.projectDir.toURI.relativize(file.toURI).path.trimTrailingSeparator
+	}
+	
+	private def trimTrailingSeparator(String path) {
+		CharMatcher.anyOf("/\\").trimTrailingFrom(path)
+	}
 }