--- qmake/generators/makefile.cpp.pkgconfig	2013-01-29 20:03:12.000000000 +0100
+++ qmake/generators/makefile.cpp	2013-03-26 19:18:07.480722316 +0100
@@ -3102,7 +3102,7 @@
 }
 
 QString
-MakefileGenerator::pkgConfigFileName(bool fixify)
+MakefileGenerator::pkgConfigFileName(bool fixify, bool onlyPrependDestdir)
 {
     QString ret = project->first("QMAKE_PKGCONFIG_FILE").toQString();
     if (ret.isEmpty()) {
@@ -3134,7 +3134,11 @@
     if(fixify) {
         if(QDir::isRelativePath(ret) && !project->isEmpty("DESTDIR"))
             ret.prepend(project->first("DESTDIR").toQString());
-        ret = fileFixify(ret, FileFixifyBackwards);
+        if (onlyPrependDestdir) {
+            ret = Option::fixPathToLocalOS(ret);
+        } else {
+            ret = fileFixify(ret, FileFixifyBackwards);
+        }
     }
     return ret;
 }
--- qmake/generators/makefile.h.orig	2013-03-26 19:17:37.624199870 +0100
+++ qmake/generators/makefile.h	2013-03-26 19:17:56.327527157 +0100
@@ -102,7 +102,7 @@
     virtual void writeDefaultVariables(QTextStream &t);
 
     QString pkgConfigPrefix() const;
-    QString pkgConfigFileName(bool fixify=true);
+    QString pkgConfigFileName(bool fixify=true, bool onlyPrependDestdir = false);
     QString pkgConfigFixPath(QString) const;
     void writePkgConfigFile();   // for pkg-config
 
--- qmake/generators/win32/winmakefile.cpp.orig	2013-03-26 19:05:13.398183953 +0100
+++ qmake/generators/win32/winmakefile.cpp	2013-03-26 19:15:02.800490466 +0100
@@ -822,7 +822,7 @@
                 }
                 if(!ret.isEmpty())
                     ret += "\n\t";
-                ret += installMetaFile(ProKey("QMAKE_PKGCONFIG_INSTALL_REPLACE"), pkgConfigFileName(true), dst_pc);
+                ret += installMetaFile(ProKey("QMAKE_PKGCONFIG_INSTALL_REPLACE"), pkgConfigFileName(true, true), dst_pc);
                 if(!uninst.isEmpty())
                     uninst.append("\n\t");
                 uninst.append("-$(DEL_FILE) " + escapeFilePath(dst_pc));