diff -uNr diffpdf-2.1.3/diffpdf.pro diffpdf-2.1.3-new/diffpdf.pro
--- diffpdf-2.1.3/diffpdf.pro	2013-10-15 09:01:22.000000000 +0200
+++ diffpdf-2.1.3-new/diffpdf.pro	2015-07-07 23:13:36.445572148 +0200
@@ -47,9 +47,9 @@
 	INCLUDEPATH += /c/poppler_lib/include/poppler/qt5
 	LIBS += -Wl,-rpath -Wl,/c/poppler_lib/bin -Wl,-L/c/poppler_lib/bin
     } else {
-	exists(/usr/include/poppler/qt5) {
-	    INCLUDEPATH += /usr/include/poppler/cpp
-	    INCLUDEPATH += /usr/include/poppler/qt5
+	exists(@@NIX_POPPLER_QT5@@/include/poppler/qt5) {
+	    INCLUDEPATH += @@NIX_POPPLER_QT5@@/include/poppler/cpp
+	    INCLUDEPATH += @@NIX_POPPLER_QT5@@/include/poppler/qt5
 	} else {
 	    INCLUDEPATH += /usr/local/include/poppler/cpp
 	    INCLUDEPATH += /usr/local/include/poppler/qt5