diff --git a/sdk/install b/sdk/install
index d9a6283..41a3e35 100755
--- a/sdk/install
+++ b/sdk/install
@@ -50,6 +50,7 @@ case $1 in
 				file=$(basename $sfd)
 				name=${file%????}
 				mkdir -p $3/m68k-amigaos/include/proto/
+				rm $3/m68k-amigaos/include/proto/$name.h
 				$3/bin/sfdc --mode=proto --target=m68k-amigaos --output=$3/m68k-amigaos/include/proto/$name.h $3/m68k-amigaos/lib/sfd/$sfd || exit 1
 				sed -i.bak -e 's/\(<clib\/.*>\)/\L\1/' -e 's/\(<defines\/.*>\)/\L\1/' -e 's/\(<inline\/.*>\)/\L\1/' -e 's/\(<pragmas\/.*>\)/\L\1/' $3/m68k-amigaos/include/proto/$name.h
 				rm $3/m68k-amigaos/include/proto/$name.h.bak
@@ -72,6 +73,7 @@ case $1 in
 				name=${file%????}
 				$3/bin/sfdc --mode=autoopen --target=m68k-amigaos --output=build/$2/$name.c $3/m68k-amigaos/lib/sfd/$name.sfd || exit 1
 				sed -i.bak -e 's/__inline//g' -e 's/: \"d0\",/:/g' build/$2/$name.c || exit 1
+				rm build/$2/$name.c.bak
 				echo $3/bin/m68k-amigaos-gcc -Os -noixemul -fomit-frame-pointer build/$2/$name.c -c
 				$3/bin/m68k-amigaos-gcc -Os -noixemul -fomit-frame-pointer build/$2/$name.c -c -o build/$2/$name.o || exit 1
 				echo $3/bin/m68k-amigaos-ar r $3/m68k-amigaos/lib/libstubs.a build/$2/$name.o
@@ -87,6 +89,7 @@ case $1 in
 				name=${file%????}
 				$3/bin/sfdc --mode=stubs --target=m68k-amigaos --output=build/$2/lib$2.c $3/m68k-amigaos/lib/sfd/$name.sfd || exit 1
 				sed -i.bak -e 's/__inline//g' -e 's/: \"d0\",/:/g' build/$2/lib$2.c || exit 1
+				rm build/$2/lib$2.c.bak
 				echo $3/bin/m68k-amigaos-gcc -Os -noixemul -fomit-frame-pointer build/$2/lib$2.c -c
 				$3/bin/m68k-amigaos-gcc -Os -noixemul -fomit-frame-pointer build/$2/lib$2.c -c -o build/$2/lib$2.o || exit 1
 				echo $3/bin/m68k-amigaos-ar r $3/m68k-amigaos/lib/lib$2.a build/$2/lib$2.o
@@ -97,11 +100,12 @@ case $1 in
 				echo "#include \"${a[2]}\"" >$3/m68k-amigaos/include/${a[1]}
 			;;
 			sed)
-				echo applying: sed -i.bak -E "${a[@]:2}" $3/${a[1]}
 				x=${a[@]:2}
 				x=${x##\"}
 				x=${x%%\"}
+				echo applying: sed -i.bak -E \""$x"\" $3/${a[1]}
 				LC_CTYPE=C sed -i.bak -E "$x" $3/${a[1]}
+				rm $3/${a[1]}.bak
 			;;
 			symlink)
 				echo creating symlink from $3/m68k-amigaos/${a[2]} to $3/m68k-amigaos/${a[1]}
diff --git a/sdk/mui.sdk b/sdk/mui.sdk
index bbd9a8c..799b3a0 100644
--- a/sdk/mui.sdk
+++ b/sdk/mui.sdk
@@ -113,5 +113,5 @@ sfdc : muimaster_lib.sfd muimaster.h muimaster_lib.h
 stubs : muimaster_lib.sfd
 lib : muimaster_lib.sfd
 patch : SDK/MUI/C/include/libraries/mui.h
-sed : m68k-amigaos/include/proto/muimaster.h "s/(#   include <inline\/muimaster_lib.h>)/#define NO_INLINE_STDARG\n#define NO_INLINE_VARARGS\n\1/g"
-sed : m68k-amigaos/include/proto/muimaster_lib.h "s/(#   include <inline\/muimaster_lib.h>)/#define NO_INLINE_STDARG\n#define NO_INLINE_VARARGS\n\1/g"
+sed : m68k-amigaos/include/proto/muimaster_lib.h "s/(#\s+include <inline\/muimaster_lib.h>)/#define NO_INLINE_STDARG\n#define NO_INLINE_VARARGS\n\1\n#undef NO_INLINE_STDARG\n#undef NO_INLINE_VARARGS\n/g"
+symlink: include/proto/muimaster_lib.h include/proto/muimaster.h
\ No newline at end of file