Problems pdebuilding a quilt-based package

[Benjamin Mesing <bensmail@gmx.net>]

Hello,

I have a package which builds just fine when running debuild. It also
works fine, taking the source files created by debuild run "dpkg-soruce
-x" and then debuild in the resulting directory. However, I am unable to
pdebuild the package from the same directory where debuild works
perfectly. Pdebuild fails to apply the quilt patches(see below).

I have no idea what is causing this. I am including the significant
parts of the debuild output as well as the pdebuild output.

Here comes the pdebuild output:
        [Setup of the build system using cowbuilder snipped]
        Setting up fakeroot (1.12.2) ...
        I: Copying back the cached apt archive contents
        I: Copying source file
        I: copying [<HOMEDIR>/umlet/umlet_9.1-1.dsc]
        I: copying [<HOMEDIR>/umlet/umlet_9.1.orig.tar.gz]
        I: copying [<HOMEDIR>/umlet/umlet_9.1-1.diff.gz]
        I: Extracting source
        dpkg-source: warning: extracting unsigned source package (umlet_9.1-1.dsc)
        dpkg-source: extracting umlet in umlet-9.1
        dpkg-source: info: unpacking umlet_9.1.orig.tar.gz
        dpkg-source: info: applying umlet_9.1-1.diff.gz
        I: Building the package
        dpkg-buildpackage: set CFLAGS to default value: -g -O2
        dpkg-buildpackage: set CPPFLAGS to default value:
        dpkg-buildpackage: set LDFLAGS to default value:
        dpkg-buildpackage: set FFLAGS to default value: -g -O2
        dpkg-buildpackage: set CXXFLAGS to default value: -g -O2
        dpkg-buildpackage: source package umlet
        dpkg-buildpackage: source version 9.1-1
        dpkg-buildpackage: source changed by Benjamin Mesing <bensmail@gmx.net>
        dpkg-buildpackage: host architecture amd64
         fakeroot debian/rules clean
        # do not abort if quilt pop fails (this is usually if there no patches applied
        quilt pop -a || true
        No patch removed
        quilt push 10_addBuildInfrastructure
        No patches in series
        make: *** [clean-patched] Error 1
        dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 2
        E: Failed autobuilding of package
        I: unmounting dev/pts filesystem
        I: unmounting proc filesystem
         -> Cleaning COW directory
          forking: rm -rf /var/cache/pbuilder/build//cow.7782

Here comes the debuild output:
         dpkg-buildpackage -rfakeroot -D -us -uc
        dpkg-buildpackage: set CFLAGS to default value: -g -O2
        dpkg-buildpackage: set CPPFLAGS to default value:     
        dpkg-buildpackage: set LDFLAGS to default value:      
        dpkg-buildpackage: set FFLAGS to default value: -g -O2
        dpkg-buildpackage: set CXXFLAGS to default value: -g -O2
        dpkg-buildpackage: source package umlet                 
        dpkg-buildpackage: source version 9.1-1                 
        dpkg-buildpackage: source changed by Benjamin Mesing <bensmail@gmx.net>
        dpkg-buildpackage: host architecture amd64                             
         fakeroot debian/rules clean                                           
        # do not abort if quilt pop fails (this is usually if there no patches applied
        quilt pop -a || true                                                          
        No patch removed                                                              
        quilt push 10_addBuildInfrastructure                                          
        Applying patch 10_addBuildInfrastructure.diff                                 
        patching file Makefile                                                        
        
        Now at patch 10_addBuildInfrastructure.diff
        rm -f build-stamp                          
        /usr/bin/make clean                        
        make[1]: Entering directory `/home/ben/debian/umlet/umlet-9.1'
        rm -f umlet.jar                                               
        rm -f epsgraphics.jar                                         
        rm -rf bin                                                    
        rm -rf epsgraphics/bin                                        
        make[1]: Leaving directory `/home/ben/debian/umlet/umlet-9.1' 
        dh_clean                                                      
        quilt pop -a                                                  
        Removing patch 10_addBuildInfrastructure.diff                 
        Removing Makefile                                             
        
        No patches applied
        QUILT_PATCHES=debian/patches quilt --quiltrc /dev/null pop -a -R || test $? = 2 
        No patch removed                                                                
        rm -rf .pc debian/stamp-patched                                                 
         dpkg-source -b umlet-9.1                                                       
        dpkg-source: info: using source format `1.0'                                    
        dpkg-source: info: building umlet using existing umlet_9.1.orig.tar.gz          
        dpkg-source: info: building umlet in umlet_9.1-1.diff.gz                        
        dpkg-source: info: building umlet in umlet_9.1-1.dsc                            
         debian/rules build                                                             
        # quilt exits with 2 as return when there was nothing to do.                    
        # That's not an error here (but it's useful to break loops in crude scripts)    
        QUILT_PATCHES=debian/patches quilt --quiltrc /dev/null push -a || test $? = 2   
        Applying patch 10_addBuildInfrastructure.diff                                   
        patching file Makefile                                                          
        
        Applying patch 20_runScript.diff
        [build process commences happily]

You can fetch the current version of the package if you need more
information to investigate:
        dget http://www.mesing.de/debian/umlet_9.1-1.dsc


Any help would be appreciated.

Best regards 

Ben