remove hardcoded stdlib path

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

plancontext/fs.go

@@ -8,11 +8,12 @@ import (
 	"github.com/google/uuid"
 	bkgw "github.com/moby/buildkit/frontend/gateway/client"
 	"go.dagger.io/dagger/compiler"
+	"go.dagger.io/dagger/stdlib"
 )
 
 var (
 	fsIDPath = cue.MakePath(
-		cue.Hid("_fs", "alpha.dagger.io/dagger"),
+		cue.Hid("_fs", stdlib.PackageName),
 		cue.Str("id"),
 	)
 )

plancontext/secret.go

@@ -6,11 +6,12 @@ import (
 
 	"cuelang.org/go/cue"
 	"go.dagger.io/dagger/compiler"
+	"go.dagger.io/dagger/stdlib"
 )
 
 var (
 	secretIDPath = cue.MakePath(
-		cue.Hid("_secret", "alpha.dagger.io/dagger"),
+		cue.Hid("_secret", stdlib.PackageName),
 		cue.Str("id"),
 	)
 )

plancontext/service.go

@@ -6,11 +6,12 @@ import (
 
 	"cuelang.org/go/cue"
 	"go.dagger.io/dagger/compiler"
+	"go.dagger.io/dagger/stdlib"
 )
 
 var (
 	serviceIDPath = cue.MakePath(
-		cue.Hid("_service", "alpha.dagger.io/dagger"),
+		cue.Hid("_service", stdlib.PackageName),
 		cue.Str("id"),
 	)
 )