Error building a very simple project with Qt Creator on Windows

[Violet Giraffe]

I have a very simple project. Main .pro file:

@
TEMPLATE = subdirs

SUBDIRS = sub_image

sub_image.subdir = image
@

And library .pro file:

@
DESTDIR = ../bin
TEMPLATE = lib
CONFIG += staticlib

OBJECTS_DIR = ../build
MOC_DIR = ../build
UI_DIR = ../build
RCC_DIR = ../build

HEADERS +=
src/image.h

SOURCES +=
src/image.cpp

win*{
QMAKE_CXXFLAGS += /MP
CXXFLAGS += /favor:blend
}
@

When I build it for the first time from scratch it builds fine. However, if I delete the "build" folder where .obj files are, it's not rebuilt as usually, instead I get the error:

C1083: Cannot open compiler generated file: '..\build\image.obj': No such file or directory

Although when I invoke build, I see in the compile output that compiler is actually being called:

@cd image\ && K:\Qt\qtcreator-2.7.0\bin\jom.exe -f Makefile
K:\Qt\qtcreator-2.7.0\bin\jom.exe -f Makefile.Debug
cl -c -nologo -Zm200 -Zc:wchar_t- /MP -Zi -MDd -GR -EHsc -W3 -w34100 -w34189 -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_GUI_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_THREAD_SUPPORT -I"k:\Qt\4.8.4\include\QtCore" -I"k:\Qt\4.8.4\include\QtGui" -I"k:\Qt\4.8.4\include" -I"k:\Qt\4.8.4\include\ActiveQt" -I"..\build" -I"k:\Qt\4.8.4\mkspecs\win32-msvc2010" -Fo..\build\ @C:\Users\Alex\AppData\Local\Temp\image.obj.7484.15.jom
image.cpp@

And if I delete "bin" folder, I get:

@
cd image\ && K:\Qt\qtcreator-2.7.0\bin\jom.exe -f Makefile
K:\Qt\qtcreator-2.7.0\bin\jom.exe -f Makefile.Release
lib /NOLOGO /OUT:..\bin\image.lib @C:\Users\Alex\AppData\Local\Temp\image.lib.6088.0.jom
LINK : fatal error LNK1104: cannot open file '..\bin\image.lib'@

If I invoke qmake from Qt Creator and then build - it builds fine, but that's not very convenient.

Here's the full project:

https://docs.google.com/file/d/0B8Qc2atC6FVKQ2RyOFdkWDdBZXM/edit?usp=sharing

My other projects don't exhibit this weird behavior. Any advices on fixing welcome.

[Violet Giraffe]

A new issue: after some doing very minor edits to the main .pro file (like reordering lines), I'm getting this message when launching build:

Error: dependent 'image-make_default' does not exist.

the "image" sub-project builds fine if I right-click it and select "Build", but not the main subdirs project. This happens if the subdirs project doesn't have

@CONFIG = ordered@