diff --git a/contrib/pngminus/png2pnm.bat b/contrib/pngminus/png2pnm.bat
old mode 100644
new mode 100755
diff --git a/contrib/pngminus/png2pnm.sh b/contrib/pngminus/png2pnm.sh
old mode 100644
new mode 100755
diff --git a/contrib/pngminus/pngminus.bat b/contrib/pngminus/pngminus.bat
old mode 100644
new mode 100755
diff --git a/contrib/pngminus/pngminus.sh b/contrib/pngminus/pngminus.sh
old mode 100644
new mode 100755
diff --git a/contrib/pngminus/pnm2png.bat b/contrib/pngminus/pnm2png.bat
old mode 100644
new mode 100755
diff --git a/contrib/pngminus/pnm2png.sh b/contrib/pngminus/pnm2png.sh
old mode 100644
new mode 100755
diff --git a/scripts/dfn.awk b/scripts/dfn.awk
old mode 100644
new mode 100755
diff --git a/scripts/libpng-config-body.in b/scripts/libpng-config-body.in
old mode 100755
new mode 100644
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
old mode 100755
new mode 100644
diff --git a/scripts/makefile.amiga b/scripts/makefile.amiga
index ba10650e8..16a4bd5d3 100644
--- a/scripts/makefile.amiga
+++ b/scripts/makefile.amiga
@@ -46,7 +46,7 @@ $(AR) libpng.lib r $(OBJS)
 $(OBJS): pngpriv.h png.h pngconf.h pnglibconf.h pnginfo.h pngstruct.h pngdebug.h
 
 pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
-COPY scripts/pnglibconf.h.prebuilt TO pnglibconf.h
+COPY $(PNGLIBCONF_H_PREBUILT) TO pnglibconf.h
 
 pngtest: pngtest.o libpng.lib
 $(LN) <WITH <
diff --git a/scripts/pnglibconf.dfa b/scripts/pnglibconf.dfa
old mode 100755
new mode 100644