diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index 011ff368509..8d47f157013 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -77,6 +77,7 @@ rec {
 
     cp ${./tarsum.go} tarsum.go
     export GOPATH=$(pwd)
+    export GOCACHE="$TMPDIR/go-cache"
     mkdir -p src/github.com/docker/docker/pkg
     ln -sT ${docker.src}/components/engine/pkg/tarsum src/github.com/docker/docker/pkg/tarsum
     go build