@@ -178,7 +178,7 @@ func (is *imageSource) ResolveImageConfig(ctx context.Context, ref string, opt l

 	case source.ResolveModePreferLocal:

 		img, err := is.resolveLocal(ref)

 		if err == nil {

-			if img.Architecture != opt.Platform.Architecture || img.Variant != opt.Platform.Variant || img.OS != opt.Platform.OS {

+			if !platformMatches(img, opt.Platform) {

 				logrus.WithField("ref", ref).Debugf("Requested build platform %s does not match local image platform %s, checking remote",

 					path.Join(opt.Platform.OS, opt.Platform.Architecture, opt.Platform.Variant),

 					path.Join(img.OS, img.Architecture, img.Variant),

@@ -273,7 +273,7 @@ func (p *puller) resolveLocal() {

 			ref := p.src.Reference.String()

 			img, err := p.is.resolveLocal(ref)

 			if err == nil {

-				if img.Architecture != p.platform.Architecture || img.Variant != p.platform.Variant || img.OS != p.platform.OS {

+				if !platformMatches(img, &p.platform) {

 					logrus.WithField("ref", ref).Debugf("Requested build platform %s does not match local image platform %s, not resolving",

 						path.Join(p.platform.OS, p.platform.Architecture, p.platform.Variant),

 						path.Join(img.OS, img.Architecture, img.Variant),

@@ -947,3 +947,13 @@ func ensureManifestRequested(ctx context.Context, res remotes.Resolver, ref stri

 		res.Resolve(ctx, ref)

 	}

 }

+

+func platformMatches(img *image.Image, p *ocispec.Platform) bool {

+	if img.Architecture != p.Architecture {

+		return false

+	}

+	if img.Variant != "" && img.Variant != p.Variant {

+		return false

+	}

+	return img.OS == p.OS

+}