diff --git a/Dockerfile.build-env b/Dockerfile.build-env
index edbc33be..6819e3b8 100644
--- a/Dockerfile.build-env
+++ b/Dockerfile.build-env
@@ -11,7 +11,11 @@ ARG WEBKIT_API=4.0
 ARG WAILS_VERSION=v2.11.0
 
 ENV DEBIAN_FRONTEND=noninteractive
-ENV PATH=/root/go/bin:/usr/local/go/bin:${PATH}
+ENV PATH=/go/bin:/usr/local/go/bin:${PATH}
+
+# Debian's /etc/profile resets PATH in login shells (bash -l), dropping the Go
+# toolchain; restore it via profile.d which is sourced after that reset.
+RUN printf 'export PATH=/go/bin:/usr/local/go/bin:$PATH\n' > /etc/profile.d/10-gonavi-build-env.sh
 
 # Copy only Node.js runtime assets so the Go toolchain from the base image
 # stays intact for smoke tests and interactive build shells.