diff --git a/libsrc/atmos/Makefile b/libsrc/atmos/Makefile
index 1f025f620..fb2376b4e 100644
--- a/libsrc/atmos/Makefile
+++ b/libsrc/atmos/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/cbm/Makefile b/libsrc/cbm/Makefile
index 3daa254af..99bf8c1d4 100644
--- a/libsrc/cbm/Makefile
+++ b/libsrc/cbm/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/common/Makefile b/libsrc/common/Makefile
index b92a02a14..e3103e460 100644
--- a/libsrc/common/Makefile
+++ b/libsrc/common/Makefile
@@ -14,7 +14,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/conio/Makefile b/libsrc/conio/Makefile
index 9fb54428b..7a3fa77e2 100644
--- a/libsrc/conio/Makefile
+++ b/libsrc/conio/Makefile
@@ -14,7 +14,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/dbg/Makefile b/libsrc/dbg/Makefile
index a7fbe923f..13ca1a17b 100644
--- a/libsrc/dbg/Makefile
+++ b/libsrc/dbg/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/em/Makefile b/libsrc/em/Makefile
index 9061fca1d..2507c7abb 100644
--- a/libsrc/em/Makefile
+++ b/libsrc/em/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/joystick/Makefile b/libsrc/joystick/Makefile
index bc59422b0..884ad06fd 100644
--- a/libsrc/joystick/Makefile
+++ b/libsrc/joystick/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/pet/Makefile b/libsrc/pet/Makefile
index 7772573f1..911f9b3ab 100644
--- a/libsrc/pet/Makefile
+++ b/libsrc/pet/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/runtime/Makefile b/libsrc/runtime/Makefile
index 7ab599219..23daed8fd 100644
--- a/libsrc/runtime/Makefile
+++ b/libsrc/runtime/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/serial/Makefile b/libsrc/serial/Makefile
index 51407e610..b6b3c946d 100644
--- a/libsrc/serial/Makefile
+++ b/libsrc/serial/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/tgi/Makefile b/libsrc/tgi/Makefile
index 17f60a904..a7f053ca3 100644
--- a/libsrc/tgi/Makefile
+++ b/libsrc/tgi/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------
diff --git a/libsrc/zlib/Makefile b/libsrc/zlib/Makefile
index 53d22743e..d00a1709c 100644
--- a/libsrc/zlib/Makefile
+++ b/libsrc/zlib/Makefile
@@ -13,7 +13,7 @@ AS	= ../../src/ca65/ca65
 CC	= ../../src/cc65/cc65
 LD	= ../../src/ld65/ld65
 
-AFLAGS	= -t $(SYS) -I../../asminc
+AFLAGS	= -t $(SYS) --forget-inc-paths -I../../asminc
 CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 
 #--------------------------------------------------------------------------