diff --git a/Makefile.work b/Makefile.work
index 323d05f027..738c471269 100644
--- a/Makefile.work
+++ b/Makefile.work
@@ -105,7 +105,7 @@ DOCKER_RUN := docker run --rm=true --privileged \
     -w $(DOCKER_BUILDER_WORKDIR) \
     -e "http_proxy=$(http_proxy)" \
     -e "https_proxy=$(https_proxy)" \
-    -i$(if $(TERM),t,)
+    -i$(shell { if [ -t 0 ]; then echo t; fi })
 
 include rules/config