# GOPATH with p1 in d2, p2 in d2
	env GOPATH=$WORK${/}d1${:}$WORK${/}d2

	# build & install p1
	env
	go install -i p1
	! stale p1
	! stale p2

	# modify p2 - p1 should appear stale
	cp $WORK/p2x.go $WORK/d2/src/p2/p2.go
	stale p1 p2

	# build & install p1 again
	go install -i p11
	! stale p1
	! stale p2

	-- $WORK/d1/src/p1/p1.go --
	package p1
	import "p2"

/**
 * A {@link BuildOperationType} for executing any kind of work inside the execution engine.
 * <p>
 * This operation encompasses most of the execution engine pipeline, starting immediately
 * after the work is identified and a workspace is assigned.
 * <p>
 * Note that the pipeline does not have to execute fully, for instance if the work is up-to-date.

      and conversions to other media types.

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object

      and conversions to other media types.

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object

      and conversions to other media types.

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object

      and conversions to other media types.

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object

            return executeWithTimeout(work, context, timeout);
        } else {
            return executeWithoutTimeout(work, context);
        }
    }

    @SuppressWarnings("Finally")
    private R executeWithTimeout(UnitOfWork work, C context, Duration timeout) {
        Timeout taskTimeout = timeoutHandler.start(Thread.currentThread(), timeout, work, currentBuildOperationRef.get());
        try {

! stderr 'go: toolchain go1.500 invoked to provide go1.700'

# go env GOWORK should not trigger a toolchain download
cd $GOPATH/work
go env GOWORK
stdout work[/\\]go.work
! stderr 'go: toolchain go1.500 invoked to provide go1.700'

-- $GOPATH/mod/go.mod --
module example.com

go 1.700

-- $GOPATH/work/go.work --
module example.com

        getWorkspace(workId) >> workspace
    }

    def step = new AssignImmutableWorkspaceStep(deleter, fileSystemAccess, immutableWorkspaceMetadataStore, outputSnapshotter, delegate)
    def work = Stub(ImmutableUnitOfWork)

    def setup() {
        work.workspaceProvider >> workspaceProvider
    }

    def "returns immutable workspace when already exists"() {
        def outputFile = immutableWorkspace.file("output.txt")

        this.delegate = delegate;
    }

    @Override
    public R execute(UnitOfWork work, C context) {
        return delegate.execute(work, context);
    }

    @Override
    public <T> Deferrable<Try<T>> executeDeferred(UnitOfWork work, C context, Cache<Identity, IdentityCacheResult<T>> cache) {
        Identity identity = context.getIdentity();