diff --git a/Source/CPack/cmCPackDebGenerator.h b/Source/CPack/cmCPackDebGenerator.h
index 7f2352f15e..84b0023ced 100644
--- a/Source/CPack/cmCPackDebGenerator.h
+++ b/Source/CPack/cmCPackDebGenerator.h
@@ -35,7 +35,10 @@ public:
     {
 #ifdef __APPLE__
     // on MacOS enable CPackDeb iff dpkg is found
-    return cmSystemTools::FindProgram("dpkg") != "" ? true : false;
+    std::vector<std::string> locations;
+    locations.push_back("/sw"); // Fink
+    locations.push_back("/opt/local"); //MacPort
+    return cmSystemTools::FindProgram("dpkg",locations) != "" ? true : false;
 #else
     // legacy behavior on other systems
     return true;
diff --git a/Source/CPack/cmCPackRPMGenerator.h b/Source/CPack/cmCPackRPMGenerator.h
index eec8204daa..c7dace4316 100644
--- a/Source/CPack/cmCPackRPMGenerator.h
+++ b/Source/CPack/cmCPackRPMGenerator.h
@@ -39,6 +39,9 @@ public:
     {
 #ifdef __APPLE__
     // on MacOS enable CPackRPM iff rpmbuild is found
+    std::vector<std::string> locations;
+    locations.push_back("/sw"); // Fink
+    locations.push_back("/opt/local"); //MacPort
     return cmSystemTools::FindProgram("rpmbuild") != "" ? true : false;
 #else
     // legacy behavior on other systems