diff --git a/src/ci/docker/host-x86_64/dist-mips-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-mips-linux/Dockerfile
index 4a090dcdd5085..3d7f5f81fbec6 100644
--- a/src/ci/docker/host-x86_64/dist-mips-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-mips-linux/Dockerfile
@@ -26,5 +26,5 @@ ENV \
 
 ENV HOSTS=mips-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
-ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
+ENV RUST_CONFIGURE_ARGS="--enable-extended --disable-docs"
+ENV SCRIPT="python3 ../x.py dist --host $HOSTS --target $HOSTS"
diff --git a/src/ci/docker/host-x86_64/dist-mips64-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-mips64-linux/Dockerfile
index 18b0375f40080..3c798d737a48d 100644
--- a/src/ci/docker/host-x86_64/dist-mips64-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-mips64-linux/Dockerfile
@@ -26,5 +26,5 @@ ENV \
 
 ENV HOSTS=mips64-unknown-linux-gnuabi64
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
-ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
+ENV RUST_CONFIGURE_ARGS="--enable-extended --disable-docs"
+ENV SCRIPT="python3 ../x.py dist --host $HOSTS --target $HOSTS"
diff --git a/src/ci/docker/host-x86_64/dist-mips64el-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-mips64el-linux/Dockerfile
index 87407203880b4..32fd634555c2b 100644
--- a/src/ci/docker/host-x86_64/dist-mips64el-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-mips64el-linux/Dockerfile
@@ -26,5 +26,5 @@ ENV \
 
 ENV HOSTS=mips64el-unknown-linux-gnuabi64
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
-ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
+ENV RUST_CONFIGURE_ARGS="--enable-extended --disable-docs"
+ENV SCRIPT="python3 ../x.py dist --host $HOSTS --target $HOSTS"
diff --git a/src/ci/docker/host-x86_64/dist-mipsel-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-mipsel-linux/Dockerfile
index 553f6ea86b72d..73ab0cf5bab65 100644
--- a/src/ci/docker/host-x86_64/dist-mipsel-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-mipsel-linux/Dockerfile
@@ -26,5 +26,5 @@ ENV \
 
 ENV HOSTS=mipsel-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
-ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
+ENV RUST_CONFIGURE_ARGS="--enable-extended --disable-docs"
+ENV SCRIPT="python3 ../x.py dist --host $HOSTS --target $HOSTS"