diff --git a/cmd/ejobs/main.go b/cmd/ejobs/main.go
index 9ab8b80..41de5b3 100644
--- a/cmd/ejobs/main.go
+++ b/cmd/ejobs/main.go
@@ -47,6 +47,7 @@ var (
 
 var (
 	minImporters int           // for start
+	noDeps       bool          // for start
 	waitInterval time.Duration // for wait
 	force        bool          // for results
 	errs         bool          // for results
@@ -69,6 +70,7 @@ var commands = []command{
 		func(fs *flag.FlagSet) {
 			fs.IntVar(&minImporters, "min", -1,
 				"run on modules with at least this many importers (<0: use server default of 10)")
+			fs.BoolVar(&noDeps, "nodeps", false, "do not download dependencies for modules")
 		},
 	},
 	{"wait", "JOBID",
@@ -269,7 +271,7 @@ func doWait(ctx context.Context, args []string) error {
 func doStart(ctx context.Context, args []string) error {
 	// Validate arguments.
 	if len(args) == 0 {
-		return errors.New("wrong number of args: want [-min N] BINARY [ARG1 ARG2 ...]")
+		return errors.New("wrong number of args: want [-min N] [-nodeps] BINARY [ARG1 ARG2 ...]")
 	}
 	binaryFile := args[0]
 	if fi, err := os.Stat(binaryFile); err != nil {
@@ -300,7 +302,8 @@ func doStart(ctx context.Context, args []string) error {
 	if err != nil {
 		return err
 	}
-	u := fmt.Sprintf("%s/analysis/enqueue?binary=%s&user=%s", workerURL, filepath.Base(binaryFile), os.Getenv("USER"))
+	u := fmt.Sprintf("%s/analysis/enqueue?binary=%s&user=%s&nodeps=%t",
+		workerURL, filepath.Base(binaryFile), os.Getenv("USER"), noDeps)
 	if len(binaryArgs) > 0 {
 		u += fmt.Sprintf("&args=%s", url.QueryEscape(strings.Join(binaryArgs, " ")))
 	}
diff --git a/internal/analysis/analysis.go b/internal/analysis/analysis.go
index d44735e..50cf2a5 100644
--- a/internal/analysis/analysis.go
+++ b/internal/analysis/analysis.go
@@ -37,6 +37,7 @@ type ScanParams struct {
 	Serve         bool   // serve results back to client instead of writing them to BigQuery
 	JobID         string // ID of job, if non-empty
 	SkipInit      bool   // if true, do not initialize non-module Go projects
+	NoDeps        bool   // if true, do not download module dependencies
 }
 
 type EnqueueParams struct {
@@ -48,6 +49,7 @@ type EnqueueParams struct {
 	Suffix   string // appended to task queue IDs to generate unique tasks
 	User     string // user initiating enqueue
 	SkipInit bool   // if true, do not initialize non-module Go projects
+	NoDeps   bool   // if true, do not download module dependencies
 }
 
 // Request implements queue.Task so it can be put on a TaskQueue.
diff --git a/internal/worker/analysis.go b/internal/worker/analysis.go
index c50651f..1828464 100644
--- a/internal/worker/analysis.go
+++ b/internal/worker/analysis.go
@@ -262,6 +262,7 @@ func (s *analysisServer) scanInternal(ctx context.Context, req *analysis.ScanReq
 		proxyClient: s.proxyClient,
 		insecure:    req.Insecure,
 		init:        !req.SkipInit,
+		noDeps:      req.NoDeps,
 	}
 	if err := prepareModule(ctx, args); err != nil {
 		return nil, err
@@ -496,6 +497,7 @@ func createAnalysisQueueTasks(params *analysis.EnqueueParams, jobID string, bina
 				Insecure:      params.Insecure,
 				JobID:         jobID,
 				SkipInit:      params.SkipInit,
+				NoDeps:        params.NoDeps,
 			},
 		})
 	}
diff --git a/internal/worker/scan.go b/internal/worker/scan.go
index 745ae65..4447121 100644
--- a/internal/worker/scan.go
+++ b/internal/worker/scan.go
@@ -244,6 +244,7 @@ type prepareModuleArgs struct {
 	proxyClient         *proxy.Client // for downloading
 	insecure            bool          // run without sandbox
 	init                bool          // run `go mod init` and `go mod tidy` on modules with no go.mod file
+	noDeps              bool          // do not download dependencies
 }
 
 // prepareModule prepares a module for scanning, and takes other actions that increase
@@ -254,6 +255,9 @@ func prepareModule(ctx context.Context, args prepareModuleArgs) error {
 		log.Debugf(ctx, "download error: %v (%[1]T)", err)
 		return err
 	}
+	if args.noDeps {
+		return nil
+	}
 
 	hasGoMod := fileExists(filepath.Join(args.dir, "go.mod"))
 	if !args.init || hasGoMod {