diff --git a/docker.nix b/docker.nix
index ca5d90635..0e29d0e0b 100644
--- a/docker.nix
+++ b/docker.nix
@@ -201,6 +201,8 @@ let
 
       mkdir $out/tmp
 
+      mkdir $out/var/tmp
+
       mkdir -p $out/etc/nix
       cat $nixConfContentsPath > $out/etc/nix/nix.conf
 
@@ -236,6 +238,7 @@ pkgs.dockerTools.buildLayeredImageWithNixDb {
   '';
   fakeRootCommands = ''
     chmod 1777 tmp
+    chmod 1777 var/tmp
   '';
 
   config = {