cmd/cue: evaluation of build attributes is order-dependent

[jpluscplusm]

What version of CUE are you using (cue version)?

$ cue version
cue version v0.9.0

go version go1.22.4
      -buildmode exe
       -compiler gc
       -trimpath true
     CGO_ENABLED 0
          GOARCH amd64
            GOOS linux
         GOAMD64 v1
cue.lang.version v0.9.0

Does this issue reproduce with the latest stable release?

Yes, 0.9.0

What did you do?

! exec cue export
cmp stderr error

exec cue export -t C
cmp stdout out

exec cue export -t A -t B
cmp stdout out

exec cue export -t A -t C
cmp stdout out

# This fails.
exec cue export -t B -t C
cmp stdout out

# This fails.
exec cue export -t A -t B -t C
cmp stdout out
-- example.cue --
@if( A && B || C )
package example

x: 1
-- out --
{
    "x": 1
}
-- error --
build constraints exclude all CUE files in .:
    example.cue: @if( A && B || C ) did not match

What did you expect to see?

A passing test.

What did you see instead?

# This fails. (0.053s)
> exec cue export -t B -t C
[stderr]
tag "B" not used in any file
[exit status 1]
FAIL: /tmp/testscript275180635/build.attributes.areOrderDependent.txtar/script.txtar:14: unexpected command failure