diff --git a/package/riscv-isa-sim/riscv-isa-sim.mk b/package/riscv-isa-sim/riscv-isa-sim.mk
index ee9067d304..90eed93c36 100644
--- a/package/riscv-isa-sim/riscv-isa-sim.mk
+++ b/package/riscv-isa-sim/riscv-isa-sim.mk
@@ -9,5 +9,6 @@ RISCV_ISA_SIM_SITE = $(call github,riscv-software-src,riscv-isa-sim,v$(RISCV_ISA
 RISCV_ISA_SIM_LICENSE = BSD-3-Clause
 RISCV_ISA_SIM_LICENSE_FILES = LICENSE
 HOST_RISCV_ISA_SIM_DEPENDENCIES = host-boost host-dtc
+HOST_RISCV_ISA_SIM_CONF_OPTS = --with-boost=$(HOST_DIR)
 
 $(eval $(host-autotools-package))