diff -r 71c04702a3d5 -r 72e3ae9a25eb make/nashorn/buildtools/nasgen/project.properties
--- a/make/nashorn/buildtools/nasgen/project.properties	Tue Sep 12 19:03:39 2017 +0200
+++ b/make/nashorn/buildtools/nasgen/project.properties	Tue Sep 12 19:03:56 2017 +0200
@@ -27,15 +27,14 @@
 javac.source=1.7
 javac.target=1.7
 
-build.classes.dir=${build.dir}/classes
+# This directory is removed when the project is cleaned:
+nasgen.build.dir=../../../../build/nashorn/nasgen
+nasgen.build.classes.dir=${nasgen.build.dir}/classes
 
 # This directory is removed when the project is cleaned:
-build.dir=build
-
-# This directory is removed when the project is cleaned:
-dist.dir=dist
-dist.jar=${dist.dir}/nasgen.jar
-dist.javadoc.dir=${dist.dir}/javadoc
+nasgen.dist.dir=${nasgen.build.dir}/dist
+nasgen.dist.jar=${nasgen.dist.dir}/nasgen.jar
+nasgen.dist.javadoc.dir=${nasgen.dist.dir}/javadoc
 
 javac.debug=true