diff --git a/linux-m68k-uclibc/Dockerfile.in b/linux-m68k-uclibc/Dockerfile.in
index 3a3bc4e..bcedd8c 100644
--- a/linux-m68k-uclibc/Dockerfile.in
+++ b/linux-m68k-uclibc/Dockerfile.in
@@ -6,7 +6,7 @@ MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 # crosstool-ng master 2021-07-07
 ENV CT_VERSION 62e9db247be34f8a4fa3bc116e60a1b15db62a97
 
-ENV QEMU_VERSION 6.0.0
+ARG QEMU_VERSION=6.0.0
 
 #include "common.crosstool"
 
diff --git a/linux-ppc64le/Dockerfile.in b/linux-ppc64le/Dockerfile.in
index c3e5f96..9ae0583 100644
--- a/linux-ppc64le/Dockerfile.in
+++ b/linux-ppc64le/Dockerfile.in
@@ -6,7 +6,7 @@ MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 # crosstool-ng master 2021-07-07
 ENV CT_VERSION 62e9db247be34f8a4fa3bc116e60a1b15db62a97
 
-ENV QEMU_VERSION 6.0.0
+ARG QEMU_VERSION=6.0.0
 
 #include "common.crosstool"
 
diff --git a/linux-riscv32/Dockerfile.in b/linux-riscv32/Dockerfile.in
index 312357b..03cb82c 100644
--- a/linux-riscv32/Dockerfile.in
+++ b/linux-riscv32/Dockerfile.in
@@ -6,7 +6,7 @@ MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 # crosstool-ng master 2021-07-07
 ENV CT_VERSION 62e9db247be34f8a4fa3bc116e60a1b15db62a97
 
-ENV QEMU_VERSION 6.0.0
+ARG QEMU_VERSION=6.0.0
 
 #include "common.crosstool"
 
diff --git a/linux-riscv64/Dockerfile.in b/linux-riscv64/Dockerfile.in
index 0a728a0..c80dbe3 100644
--- a/linux-riscv64/Dockerfile.in
+++ b/linux-riscv64/Dockerfile.in
@@ -6,7 +6,7 @@ MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 # crosstool-ng master 2021-07-07
 ENV CT_VERSION 62e9db247be34f8a4fa3bc116e60a1b15db62a97
 
-ENV QEMU_VERSION 6.0.0
+ARG QEMU_VERSION=6.0.0
 
 #include "common.crosstool"