diff --git a/aliases.sh b/aliases.sh
index 378f60f..59bbbfb 100644
--- a/aliases.sh
+++ b/aliases.sh
@@ -1,7 +1,9 @@
 # Copy this file to ~/.bashrc./ for some buildenv aliases.
 #
 
-alias b='toolbox run -c creatures-buildenv b'
-alias bdep='toolbox run -c creatures-buildenv bdep'
-alias bpkg='toolbox run -c creatures-buildenv bpkg'
-alias yarn='toolbox run -c creatures-buildenv yarn'
+if [ ! -f "/run/.toolboxenv" ]; then
+	alias b='toolbox run -c creatures-buildenv b'
+	alias bdep='toolbox run -c creatures-buildenv bdep'
+	alias bpkg='toolbox run -c creatures-buildenv bpkg'
+	alias yarn='toolbox run -c creatures-buildenv yarn'
+fi