diff --git a/src/gsiqt/qt4/qt4.pro b/src/gsiqt/qt4/qt4.pro
index e93ae8d78..01daec72f 100644
--- a/src/gsiqt/qt4/qt4.pro
+++ b/src/gsiqt/qt4/qt4.pro
@@ -9,3 +9,8 @@ SUBDIRS = \
   QtNetwork \
   QtDesigner
 
+# This is weired, but true: because QSignalMapper (inside QtCore) has a QWidget
+# argument, we need to enforce linking of QtCore against QtGui so this GSI declaration
+# is available there
+# TODO:
+QtCore.depends += QtGui
diff --git a/src/klayout.pro b/src/klayout.pro
index 2cbe8cb65..e6c91bfbe 100644
--- a/src/klayout.pro
+++ b/src/klayout.pro
@@ -40,7 +40,7 @@ equals(HAVE_PYTHON, "1") {
   LANG_DEPENDS += pya
   pya.depends += gsi db
   SUBDIRS += pymod
-  pymod.depends += pya
+  pymod.depends += pya lay
 } else {
   SUBDIRS += pyastub
   pyastub.depends += gsi
@@ -69,7 +69,7 @@ buddies.depends += rdb lib $$LANG_DEPENDS
 
 equals(HAVE_QTBINDINGS, "1") {
   SUBDIRS += gsiqt
-  gsiqt.depends += gsi
+  gsiqt.depends += gsi db
   laybasic.depends += gsiqt
   pymod.depends += gsiqt
 }
diff --git a/src/pymod/pymod.pro b/src/pymod/pymod.pro
index dd371b5de..c1471d747 100644
--- a/src/pymod/pymod.pro
+++ b/src/pymod/pymod.pro
@@ -31,4 +31,3 @@ equals(HAVE_QT5, "1") {
     QtDesigner
 
 }
-