Thanks, Microsoft! Thanks a fucking lot for making your uuids case sensitive in one location and case insensitive in another. And thanks especially a fucking lot for failing in this case while pretending thate everything works. Fuck you!

backends.py

@@ -1232,7 +1232,7 @@ class Vs2010Backend(Backend):
         ofile.write('Microsoft Visual Studio Solution File, Format Version 11.00\n')
         ofile.write('# Visual Studio 2010\n')
         for p in projlist:
-            prj_line = 'Project("%s") = "%s", "%s", "{%s}"\nEndProject\n' % \
+            prj_line = 'Project("{%s}") = "%s", "%s", "{%s}"\nEndProject\n' % \
                 (self.environment.coredata.guid, p[0], p[1], p[2])
             ofile.write(prj_line)
         ofile.write('Global\n')
@@ -1288,7 +1288,7 @@ class Vs2010Backend(Backend):
         pl = ET.SubElement(prjconf, 'Platform')
         pl.text = platform
         globalgroup = ET.SubElement(root, 'PropertyGroup', Label='Globals')
-        guidelem = ET.SubElement(globalgroup, 'ProjectGUID')
+        guidelem = ET.SubElement(globalgroup, 'ProjectGuid')
         guidelem.text = guid
         kw = ET.SubElement(globalgroup, 'Keyword')
         kw.text = 'Win32Proj'

coredata.py

@@ -23,7 +23,7 @@ version = '0.14.0-research'
 class CoreData():
 
     def __init__(self, options):
-        self.guid = str(uuid.uuid4())
+        self.guid = str(uuid.uuid4()).upper()
         self.target_guids = {}
         self.version = version
         self.prefix = options.prefix

interpreter.py

@@ -1162,7 +1162,7 @@ class Interpreter():
         l = targetclass(name, self.subdir, is_cross, sources, objs, self.environment, kwargs)
         self.build.targets[name] = l.held_object
         if name not in self.coredata.target_guids:
-            self.coredata.target_guids[name] = str(uuid.uuid4())
+            self.coredata.target_guids[name] = str(uuid.uuid4()).upper()
         if self.environment.is_cross_build() and l.is_cross:
             txt = ' cross build '
         else: