Comment 1 for bug 1159885

=== modified file 'environs/ec2/ec2.go'
--- environs/ec2/ec2.go 2013-03-21 04:04:27 +0000
+++ environs/ec2/ec2.go 2013-03-25 17:54:17 +0000
@@ -244,6 +244,7 @@
        flags := environs.HighestVersion | environs.CompatVersion
        v := version.Current
        v.Series = env.Config().DefaultSeries()
+ v.Arch = "amd64"
        // TODO: set Arch based on constraints (when they are landed)
        return environs.FindTools(env, v, flags)
 }
@@ -286,7 +287,7 @@
        }
        v := version.Current
        v.Series = tools.Series
- v.Arch = tools.Arch
+ v.Arch = "amd64"
        mongoURL := environs.MongoURL(e, v)
        inst, err := e.startInstance(&startInstanceParams{
                machineId: "0",
@@ -449,7 +450,7 @@
        spec, err := findInstanceSpec(&instanceConstraint{
                region: e.ecfg().region(),
                series: scfg.series,
- arches: []string{scfg.tools.Arch},
+ arches: []string{scfg.tools.Arch, "amd64"},
                constraints: scfg.constraints,
        })
        if err != nil {