qmake generated xcode projects fail if the path name contains space characters

When I create a xcode project from a .pro file the build fails in XCode.

It happens during the "Qt Qmake" and "Qt Preprocessors" build phases. Problem is that the command in the two build phases fails if the path name has space characters.

See example:
/* Begin PBXShellScriptBuildPhase section */
A0A52A2ADF7A1E2A99738674 /* Qt Preprocessors */ =

{ isa = PBXShellScriptBuildPhase; buildActionMask = 2147483647; files = ( ); name = "Qt Preprocessors"; runOnlyForDeploymentPostprocessing = 0; shellPath = /bin/sh; shellScript = "make -C /Users/de8olihe/perforce/olimac/EasyBuilder/BrickBuilder 2 -f BrickBuilder.xcodeproj/qt_preprocess.mak"; }

;
D7BA7D76DAB5DD13389D6332 /* Qt Qmake */ =

{ isa = PBXShellScriptBuildPhase; buildActionMask = 2147483647; files = ( ); name = "Qt Qmake"; runOnlyForDeploymentPostprocessing = 0; shellPath = /bin/sh; shellScript = "make -C /Users/de8olihe/perforce/olimac/EasyBuilder/BrickBuilder 2 -f BrickBuilder.xcodeproj/qt_makeqmake.mak"; }

;
/* End PBXShellScriptBuildPhase section */

In the "shellScript" variables the path name is "/Users/de8olihe/perforce/olimac/EasyBuilder/BrickBuilder 2".

Solution:
I have to wrap the pathname with " to get this problems solved every time I have converter the .pro file in a xcode project!