diff -Nurd -x'*~' easychem-0.6.orig/Makefile.linux easychem-0.6/Makefile.linux
--- easychem-0.6.orig/Makefile.linux	2005-05-04 04:10:07.000000000 -0400
+++ easychem-0.6/Makefile.linux	2007-02-13 00:08:41.000000000 -0500
@@ -1,21 +1,21 @@
 # The C compiler
 CC=gcc
 
-# The following line must be uncommented if you want to specify a place
-# where the 'gs' (or 'pstoedit') program is.
-
-#C_FLAGS="$(C_FLAGS) -DGS_PATH=/opt/bin"
-#C_FLAGS="$(C_FLAGS) -DPSTOEDIT_PATH=/opt/bin"
-
 # Here we define the prefix where EasyChem will be installed
 PREFIX=/usr/local
 
 # Optimisation and warning flags
 C_FLAGS=-Wall -W -Wpointer-arith -O2 -pedantic -std=c99 -DUNIX -DI18N -DPREFIX=\"$(PREFIX)\"
 
+# The following line must be uncommented if you want to specify a place
+# where the 'gs' (or 'pstoedit') program is.
+
+C_FLAGS+=-DGS_PATH=\"$(PREFIX)/bin\"
+C_FLAGS+=-DPSTOEDIT_PATH=\"$(PREFIX)/bin\"
+
 # GTK flags and librairies
-GTK_FLAGS=`pkg-config --cflags gtk+-2.0`
-GTK_LIBS=`pkg-config --libs gtk+-2.0`
+GTK_FLAGS=`pkg-config --cflags gtk+-2.0` $(CPPFLAGS)
+GTK_LIBS=`pkg-config --libs gtk+-2.0` $(LDFLAGS)