diff --git a/go/pkg/container/service.go b/go/pkg/container/service.go
index 3ff3aff5..3dbbb270 100644
--- a/go/pkg/container/service.go
+++ b/go/pkg/container/service.go
@@ -18,6 +18,18 @@ var timContainerNamePattern = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9_.-]*$`)
 
 func NewService(c *core.Core, options TIMOptions) *Service {
 	options, err := normalizeTIMOptions(options)
+	if options.Exec == nil && c != nil {
+		options.Exec = func(ctx context.Context, name string, args ...string) error {
+			result := c.Process().Run(ctx, name, args...)
+			if result.OK {
+				return nil
+			}
+			if err, ok := result.Value.(error); ok {
+				return err
+			}
+			return core.E("container.TIMManager.Exec", result.Error(), nil)
+		}
+	}
 	return &Service{
 		ServiceRuntime: core.NewServiceRuntime(c, options),
 		manager:        NewTIMManager(options),
diff --git a/go/pkg/display/marketplace.go b/go/pkg/display/marketplace.go
index f0181015..ced04a80 100644
--- a/go/pkg/display/marketplace.go
+++ b/go/pkg/display/marketplace.go
@@ -89,7 +89,7 @@ func (s *Service) registerMarketplaceActions() {
 		installer := marketplace.Installer{
 			HTTPClient: marketplaceHTTPClient,
 			GitBinary:  input.GitBinary,
-			GitRunner:  marketplaceGitRunner,
+			GitRunner:  s.marketplaceGitRunner(),
 			InstallDir: marketplaceInstallRoot(input.InstallDir),
 		}
 		manifest, err := installer.Verify(ctx, input.ManifestURL)
@@ -132,3 +132,29 @@ func marketplaceInstallRoot(raw string) string {
 	}
 	return core.PathJoin(home, ".core", "apps")
 }
+
+func (s *Service) marketplaceGitRunner() func(context.Context, string, ...string) ([]byte, error) {
+	if marketplaceGitRunner != nil {
+		return marketplaceGitRunner
+	}
+	coreRef := s.coreRef()
+	if coreRef == nil {
+		return nil
+	}
+	return func(ctx context.Context, binary string, args ...string) ([]byte, error) {
+		result := coreRef.Process().Run(ctx, binary, args...)
+		if !result.OK {
+			return nil, coreResultError(result, "failed to run marketplace git command")
+		}
+		switch output := result.Value.(type) {
+		case []byte:
+			return append([]byte(nil), output...), nil
+		case string:
+			return []byte(output), nil
+		case nil:
+			return nil, nil
+		default:
+			return []byte(core.Sprint(output)), nil
+		}
+	}
+}