diff --git a/litex_boards/official/targets/versa_ecp5.py b/litex_boards/official/targets/versa_ecp5.py
index c108d32..c7d6541 100755
--- a/litex_boards/official/targets/versa_ecp5.py
+++ b/litex_boards/official/targets/versa_ecp5.py
@@ -11,6 +11,8 @@ from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import versa_ecp5
 
+from litex.build.lattice.trellis import trellis_args, trellis_argdict
+
 from litex.soc.cores.clock import *
 from litex.soc.integration.soc_sdram import *
 from litex.soc.integration.builder import *
@@ -133,6 +135,7 @@ def main():
         help='gateware toolchain to use, diamond (default) or  trellis')
     builder_args(parser)
     soc_sdram_args(parser)
+    trellis_args(parser)
     parser.add_argument("--sys-clk-freq", default=75e6,
                         help="system clock frequency (default=75MHz)")
     parser.add_argument("--with-ethernet", action="store_true",
@@ -142,7 +145,7 @@ def main():
     cls = EthernetSoC if args.with_ethernet else BaseSoC
     soc = cls(toolchain=args.toolchain, sys_clk_freq=int(float(args.sys_clk_freq)), **soc_sdram_argdict(args))
     builder = Builder(soc, **builder_argdict(args))
-    builder.build()
+    builder.build(**trellis_argdict(args))
 
 if __name__ == "__main__":
     main()
diff --git a/litex_boards/partner/targets/trellisboard.py b/litex_boards/partner/targets/trellisboard.py
index 627b9ff..dbf1a86 100755
--- a/litex_boards/partner/targets/trellisboard.py
+++ b/litex_boards/partner/targets/trellisboard.py
@@ -10,6 +10,8 @@ from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex_boards.platforms import trellisboard
 
+from litex.build.lattice.trellis import trellis_args, trellis_argdict
+
 from litex.soc.cores.clock import *
 from litex.soc.integration.soc_sdram import *
 from litex.soc.integration.builder import *
@@ -135,6 +137,7 @@ def main():
         help='gateware toolchain to use, diamond (default) or  trellis')
     builder_args(parser)
     soc_sdram_args(parser)
+    trellis_args(parser)
     parser.add_argument("--sys-clk-freq", default=75e6,
                         help="system clock frequency (default=75MHz)")
     parser.add_argument("--with-ethernet", action="store_true",
@@ -144,7 +147,7 @@ def main():
     cls = EthernetSoC if args.with_ethernet else BaseSoC
     soc = cls(toolchain=args.toolchain, sys_clk_freq=int(float(args.sys_clk_freq)), **soc_sdram_argdict(args))
     builder = Builder(soc, **builder_argdict(args))
-    builder.build()
+    builder.build(**trellis_argdict(args))
 
 if __name__ == "__main__":
     main()