diff -r -U2 pari-2.9.4.orig/config/Makefile.SH pari-2.9.4/config/Makefile.SH
--- pari-2.9.4.orig/config/Makefile.SH	2017-11-09 16:26:14.000000000 +0700
+++ pari-2.9.4/config/Makefile.SH	2018-01-13 17:31:02.404210285 +0700
@@ -80,10 +80,10 @@
   graph=plotQt;;
 Qt4)
-  PLOTCFLAGS='-D__FANCY_WIN__ -I$(QTDIR)/include'
-  PLOTLIBS="-L\$(QTDIR)/lib $QTLIB"
+  PLOTCFLAGS='-D__FANCY_WIN__ `pkg-config --cflags QtGui`'
+  PLOTLIBS="`pkg-config --libs QtGui`"
   graph=plotQt4;;
 fltk)
-  PLOTCFLAGS=
-  PLOTLIBS="$FLTK_LIBS"
+  PLOTCFLAGS="`fltk-config --cxxflags` $X11_INC"
+  PLOTLIBS="`fltk-config --ldflags`"
   postconfig='fltk-config --post '
   graph=plotfltk;;
@@ -277,5 +277,5 @@
 # Graphic library.
 QTDIR      = "$QTDIR"
-MOC        = \$(QTDIR)/bin/moc
+MOC        = "`which moc`"
 PLOTCFLAGS = $PLOTCFLAGS
 PLOTLIBS   = $PLOTLIBS
diff -r -U2 pari-2.9.4.orig/config/get_Qt pari-2.9.4/config/get_Qt
--- pari-2.9.4.orig/config/get_Qt	2017-05-12 16:45:12.000000000 +0700
+++ pari-2.9.4/config/get_Qt	2018-01-13 17:35:49.481198212 +0700
@@ -6,5 +6,5 @@
 yes)
    pth="/usr/local/lib /usr/local/share /usr/lib /usr/share"
-   QTDIR=`locatedir qt4/bin $pth`
+   QTDIR=`locatedir qt4 $pth`
    if test -n "$QTDIR"; then
      QTLIB="-lQtCore -lQtGui"
diff -r -U2 pari-2.9.4.orig/config/get_config_options pari-2.9.4/config/get_config_options
--- pari-2.9.4.orig/config/get_config_options	2017-11-09 16:26:14.000000000 +0700
+++ pari-2.9.4/config/get_config_options	2018-01-13 17:38:39.264191072 +0700
@@ -87,8 +87,10 @@
       with_ncurses_lib=`echo "$1" | sed -e 's/[-a-z]*=//'` ;;
 
+  --without-qt|--with-qt=no) without_qt=yes ;;
   --with-qt) with_qt=yes ;;
   --with-qt=*)
       with_qt=`echo "$1" | sed -e 's/[-a-z]*=//'` ;;
 
+  --without-fltk|--with-fltk=no) without_fltk=yes ;;
   --with-fltk) with_fltk=yes ;;
   --with-fltk=*)
@@ -168,5 +170,7 @@
 
   --with-qt[=DIR]        use the Qt graphical library [prefix for Qt dir.]
+  --without-qt           do not try to use the Qt lib
   --with-fltk            use the FLTK graphical library [need fltk-config]
+  --without-fltk         do not try to use the FLTK lib
 
 Miscellaneous
diff -r -U2 pari-2.9.4.orig/config/get_graphic_lib pari-2.9.4/config/get_graphic_lib
--- pari-2.9.4.orig/config/get_graphic_lib	2017-11-09 16:26:14.000000000 +0700
+++ pari-2.9.4/config/get_graphic_lib	2018-01-13 17:42:45.760180706 +0700
@@ -8,4 +8,5 @@
 if test -n "$with_fltk"; then which_graphic_lib=fltk; fi
 if test -n "$with_qt";   then which_graphic_lib=Qt; fi
+if test -n "$without_fltk" -a -n "$without_qt"; then which_graphic_lib=none; fi
 if test "$fastread" != yes; then
   cat << EOT