sh := b.Shell(a)
	p := a.Package
	p.Internal.Cover.Cfg = a.Objdir + "coveragecfg"
	pcfg := covcmd.CoverPkgConfig{
		PkgPath: p.ImportPath,
		PkgName: p.Name,
		// Note: coverage granularity is currently hard-wired to
		// 'perblock'; there isn't a way using "go build -cover" or "go
		// test -cover" to select it. This may change in the future