diff --git a/MANIFEST.in b/MANIFEST.in
index a15c845d9..d64974bd3 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,8 +1 @@
 graft litex/build/sim
-graft litex/soc/software
-graft litex/soc/cores/cpu/lm32/verilog
-graft litex/soc/cores/cpu/minerva/verilog
-graft litex/soc/cores/cpu/mor1kx/verilog
-graft litex/soc/cores/cpu/picorv32/verilog
-graft litex/soc/cores/cpu/rocket/verilog
-graft litex/soc/cores/cpu/vexriscv/verilog