diff --git a/mk/config.mk b/mk/config.mk
index e40e096..5e0bfc8 100644
--- a/mk/config.mk
+++ b/mk/config.mk
@@ -22,8 +22,9 @@ FILESYSTEM_CONFIG?=config/$(ARCH)/$(CONFIG_NAME).toml
 else
 FILESYSTEM_CONFIG?=config/$(ARCH)/$(BOARD)/$(CONFIG_NAME).toml
 endif
+HOST_CARGO=env -u RUSTUP_TOOLCHAIN -u CC -u TARGET cargo
 ## Filesystem size in MB (default comes from filesystem_size in the FILESYSTEM_CONFIG)
-FILESYSTEM_SIZE?=$(shell cargo run --release --manifest-path installer/Cargo.toml -- --filesystem-size -c $(FILESYSTEM_CONFIG))
+FILESYSTEM_SIZE?=$(shell $(HOST_CARGO) run --release --manifest-path installer/Cargo.toml -- --filesystem-size -c $(FILESYSTEM_CONFIG))
 ## Flags to pass to redoxfs-mkfs. Add --encrypt to set up disk encryption
 REDOXFS_MKFS_FLAGS?=
 ## Set to 1 to enable Podman build, any other value will disable it
@@ -32,7 +33,6 @@ PODMAN_BUILD?=0
 CONTAINERFILE?=podman/redox-base-containerfile
 
 # Per host variables
-HOST_CARGO=env -u RUSTUP_TOOLCHAIN cargo
 export NPROC=nproc
 export REDOX_MAKE=make
 HOST_TARGET := $(shell env -u RUSTUP_TOOLCHAIN rustc -vV | grep host | cut -d: -f2 | tr -d " ")