diff --git a/vars/build.vars b/vars/build.vars
index 819cadc..3e556c1 100644
--- a/vars/build.vars
+++ b/vars/build.vars
@@ -429,7 +429,7 @@ LEAF_PACKAGES_PREFIX="${PREFIX_NATIVE}";
 : ${PKG_CHICKEN_MAKEFLAGS_BUILD:="PLATFORM=midipix-${ARCH} PREFIX=${PREFIX_NATIVE} TARGET_PREFIX=${PREFIX_NATIVE} C_COMPILER=${TARGET}-gcc HOSTSYSTEM=${TARGET}"};
 : ${PKG_CHICKEN_MAKEFLAGS_BUILD_EXTRA_DEBUG:=DEBUGBUILD=1};
 : ${PKG_CHICKEN_MAKEFLAGS_BUILD_EXTRA_RELEASE:=DEBUGBUILD=0};
-: ${PKG_CHICKEN_MAKEFLAGS_INSTALL:="PLATFORM=midipix-${ARCH} PREFIX=${PREFIX_NATIVE} TARGET_PREFIX=${PREFIX_NATIVE} C_COMPILER=${TARGET}-gcc HOSTSYSTEM=${TARGET}"};
+: ${PKG_CHICKEN_MAKEFLAGS_INSTALL:="PLATFORM=midipix-${ARCH} PREFIX=${PREFIX_NATIVE} TARGET_PREFIX=${PREFIX_NATIVE} C_COMPILER=${TARGET}-gcc HOSTSYSTEM=${TARGET} CROSS_CHICKEN=1"};
 : ${PKG_CHICKEN_NO_CLEAN:=1};
 : ${PKG_CMAKE_SHA256SUM:=7d73ee4fae572eb2d7cd3feb48971aea903bb30a20ea5ae8b4da826d8ccad5fe};
 : ${PKG_CMAKE_VERSION:=3.6.3};