diff --git a/bootstrap/builder/Configuration.py b/bootstrap/builder/Configuration.py
index 070877f6..ca574de7 100644
--- a/bootstrap/builder/Configuration.py
+++ b/bootstrap/builder/Configuration.py
@@ -167,7 +167,8 @@ class Configuration ( object ):
         elif self._osFedora    .match(lines[0]): self._osType = "Linux.fc"
         elif self._osLinux_64  .match(lines[0]):
             self._osType    = "Linux.x86_64"
-            self._libSuffix = "64"
+            if os.path.exists("/usr/lib64/"):
+                self._libSuffix = "64"
         elif self._osLinux     .match(lines[0]): self._osType = "Linux.i386"
         elif self._osDarwin    .match(lines[0]): self._osType = "Darwin"
         elif self._osFreeBSD8x_amd64.match(lines[0]):
diff --git a/bootstrap/coriolisEnv.py b/bootstrap/coriolisEnv.py
index d3cefae1..5070dfa0 100755
--- a/bootstrap/coriolisEnv.py
+++ b/bootstrap/coriolisEnv.py
@@ -84,7 +84,8 @@ def guessOs ():
       libDir = "lib64"
     elif osLinux_64.match(lines[0]):
       osType = "Linux.x86_64"
-      libDir = "lib64"
+      if(os.path.exists("/usr/lib64/")):
+        libDir = "lib64"
     elif osLinux.match(lines[0]):
       osType = "Linux.i386"
     elif osFreeBSD8x_64.match(lines[0]):