diff --git a/tools/cmake.py b/tools/cmake.py
index 811b6693cb..02229556a1 100644
--- a/tools/cmake.py
+++ b/tools/cmake.py
@@ -8,6 +8,7 @@ import sys
 import re
 import utils
 import rtconfig
+from utils import _make_path_relative
 
 
 def GenerateCFiles(env,project):
@@ -106,7 +107,9 @@ def GenerateCFiles(env,project):
 
         cm_file.write("INCLUDE_DIRECTORIES(\n")
         for i in info['CPPPATH']:
-            cm_file.write( "\t" + i.replace("\\", "/") + "\n")
+            # use relative path
+            path = _make_path_relative(os.getcwd(), i)
+            cm_file.write( "\t" + path.replace("\\", "/") + "\n")
         cm_file.write(")\n\n")
 
         cm_file.write("ADD_DEFINITIONS(\n")
@@ -117,7 +120,9 @@ def GenerateCFiles(env,project):
         cm_file.write("SET(PROJECT_SOURCES\n")
         for group in project:
             for f in group['src']:
-                cm_file.write( "\t" + os.path.normpath(f.rfile().abspath).replace("\\", "/") + "\n" )
+                # use relative path
+                path = _make_path_relative(os.getcwd(), os.path.normpath(f.rfile().abspath))
+                cm_file.write( "\t" + path.replace("\\", "/") + "\n" )
         cm_file.write(")\n\n")
 
         if rtconfig.PLATFORM == 'gcc':
diff --git a/tools/vsc.py b/tools/vsc.py
index 99a49789b7..5eed941bc8 100644
--- a/tools/vsc.py
+++ b/tools/vsc.py
@@ -29,6 +29,9 @@ import os
 import json
 import utils
 import rtconfig
+import rtconfig
+from utils import _make_path_relative
+
 
 def GenerateCFiles(env):
     """
@@ -56,9 +59,9 @@ def GenerateCFiles(env):
         includePath = []
         for i in info['CPPPATH']:
             if i[0] == '\"' and i[len(i) - 2:len(i)] == '\",':
-                includePath.append(i[1:len(i) - 2])
+                includePath.append(_make_path_relative(os.getcwd(), i[1:len(i) - 2]))
             else:
-                includePath.append(i)
+                includePath.append(_make_path_relative(os.getcwd(), i))
         config_obj['includePath'] = includePath
 
         json_obj = {}