diff --git a/internal/commands/extension_package.go b/internal/commands/extension_package.go
index 57395c9f1..9c2642981 100644
--- a/internal/commands/extension_package.go
+++ b/internal/commands/extension_package.go
@@ -19,13 +19,14 @@ import (
 
 // ExtensionPackageFlags define flags provided to the ExtensionPackage command
 type ExtensionPackageFlags struct {
-	PackageTomlPath string
-	Format          string
-	Targets         []string
-	Publish         bool
-	Policy          string
-	Path            string
-	AdditionalTags  []string
+	PackageTomlPath       string
+	Format                string
+	Targets               []string
+	Publish               bool
+	Policy                string
+	Path                  string
+	AppendImageNameSuffix bool
+	AdditionalTags        []string
 }
 
 // ExtensionPackager packages extensions
@@ -114,15 +115,20 @@ func ExtensionPackage(logger logging.Logger, cfg config.Config, packager Extensi
 				defer clean(filesToClean)
 			}
 
+			if !flags.Publish && flags.AppendImageNameSuffix {
+				logger.Warnf("--append-image-name-suffix will be ignored, use combined with --publish")
+			}
+
 			if err := packager.PackageExtension(cmd.Context(), client.PackageBuildpackOptions{
-				RelativeBaseDir: relativeBaseDir,
-				Name:            name,
-				Format:          flags.Format,
-				Config:          exPackageCfg,
-				Publish:         flags.Publish,
-				PullPolicy:      pullPolicy,
-				Targets:         multiArchCfg.Targets(),
-				AdditionalTags:  flags.AdditionalTags,
+				RelativeBaseDir:       relativeBaseDir,
+				Name:                  name,
+				Format:                flags.Format,
+				Config:                exPackageCfg,
+				Publish:               flags.Publish,
+				AppendImageNameSuffix: flags.AppendImageNameSuffix && flags.Publish,
+				PullPolicy:            pullPolicy,
+				Targets:               multiArchCfg.Targets(),
+				AdditionalTags:        flags.AdditionalTags,
 			}); err != nil {
 				return err
 			}
@@ -145,6 +151,7 @@ func ExtensionPackage(logger logging.Logger, cfg config.Config, packager Extensi
 	cmd.Flags().StringVarP(&flags.PackageTomlPath, "config", "c", "", "Path to package TOML config")
 	cmd.Flags().StringVarP(&flags.Format, "format", "f", "", `Format to save package as ("image" or "file")`)
 	cmd.Flags().BoolVar(&flags.Publish, "publish", false, `Publish the extension directly to the container registry specified in <name>, instead of the daemon (applies to "--format=image" only).`)
+	cmd.Flags().BoolVar(&flags.AppendImageNameSuffix, "append-image-name-suffix", false, "When publishing to a registry that doesn't allow overwrite existing tags use this flag to append a [os]-[arch] suffix to package <name>")
 	cmd.Flags().StringVar(&flags.Policy, "pull-policy", "", "Pull policy to use. Accepted values are always, never, and if-not-present. The default is always")
 	cmd.Flags().StringVarP(&flags.Path, "path", "p", "", "Path to the Extension that needs to be packaged")
 	cmd.Flags().StringSliceVarP(&flags.Targets, "target", "t", nil,
diff --git a/internal/commands/extension_package_test.go b/internal/commands/extension_package_test.go
index 241c4dfc0..e90a4924e 100644
--- a/internal/commands/extension_package_test.go
+++ b/internal/commands/extension_package_test.go
@@ -181,6 +181,39 @@ func testExtensionPackageCommand(t *testing.T, when spec.G, it spec.S) {
 			})
 		})
 
+		when("--append-image-name-suffix", func() {
+			it("passes the flag to the packager when publishing", func() {
+				cmd := packageExtensionCommand(withExtensionPackager(fakeExtensionPackager))
+				cmd.SetArgs([]string{
+					"some-image-name",
+					"--config", "/path/to/some/file",
+					"--publish",
+					"--append-image-name-suffix",
+				})
+				h.AssertNil(t, cmd.Execute())
+
+				receivedOptions := fakeExtensionPackager.CreateCalledWithOptions
+				h.AssertEq(t, receivedOptions.AppendImageNameSuffix, true)
+			})
+
+			it("is ignored and warns when not publishing", func() {
+				cmd := packageExtensionCommand(
+					withExtensionPackager(fakeExtensionPackager),
+					withExtensionLogger(logger),
+				)
+				cmd.SetArgs([]string{
+					"some-image-name",
+					"--config", "/path/to/some/file",
+					"--append-image-name-suffix",
+				})
+				h.AssertNil(t, cmd.Execute())
+
+				receivedOptions := fakeExtensionPackager.CreateCalledWithOptions
+				h.AssertEq(t, receivedOptions.AppendImageNameSuffix, false)
+				h.AssertContains(t, outBuf.String(), "--append-image-name-suffix will be ignored")
+			})
+		})
+
 		when("no config path is specified", func() {
 			when("no path is specified", func() {
 				it("creates a default config with the uri set to the current working directory", func() {
diff --git a/pkg/client/package_extension.go b/pkg/client/package_extension.go
index 584700eb9..c9d68697b 100644
--- a/pkg/client/package_extension.go
+++ b/pkg/client/package_extension.go
@@ -8,6 +8,7 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/buildpacks/pack/internal/layer"
+	"github.com/buildpacks/pack/internal/name"
 	"github.com/buildpacks/pack/internal/style"
 	"github.com/buildpacks/pack/pkg/buildpack"
 	"github.com/buildpacks/pack/pkg/dist"
@@ -103,7 +104,14 @@ func (c *Client) packageExtensionTarget(ctx context.Context, opts PackageBuildpa
 			return digest, err
 		}
 	case FormatImage:
-		img, err := packageBuilder.SaveAsImage(opts.Name, opts.Publish, target, opts.Labels, opts.AdditionalTags...)
+		packageName := opts.Name
+		if multiArch && opts.AppendImageNameSuffix {
+			packageName, err = name.AppendSuffix(packageName, target)
+			if err != nil {
+				return "", errors.Wrap(err, "invalid image name")
+			}
+		}
+		img, err := packageBuilder.SaveAsImage(packageName, opts.Publish, target, opts.Labels, opts.AdditionalTags...)
 		if err != nil {
 			return digest, errors.Wrapf(err, "saving image")
 		}