diff --git a/packages/docker-build/src/commands/build.ts b/packages/docker-build/src/commands/build.ts
index 793fb27..2189860 100644
--- a/packages/docker-build/src/commands/build.ts
+++ b/packages/docker-build/src/commands/build.ts
@@ -8,6 +8,7 @@ import {
   StreamReport,
   execUtils,
 } from '@yarnpkg/core';
+import { patchUtils } from '@yarnpkg/plugin-patch';
 import getDockerFilePath from '../utils/getDockerFilePath';
 import getRequiredWorkspaces from '../utils/getRequiredWorkspaces';
 import copyRcFile from '../utils/copyRcFile';
@@ -19,7 +20,8 @@ import copyCacheMarkedFiles from '../utils/copyCacheMarkedFiles';
 import generateLockfile from '../utils/generateLockfile';
 import packWorkspace from '../utils/packWorkspace';
 import copyAdditional from '../utils/copyAdditional';
-import copyPatchFiles from '../utils/copyPatchFiles';
+import copyProtocolFiles from '../utils/copyProtocolFiles';
+import { parseSpec } from '../utils/execUtils';
 
 export default class DockerBuildCommand extends BaseCommand {
   @Command.String()
@@ -128,10 +130,27 @@ export default class DockerBuildCommand extends BaseCommand {
               report,
             });
 
-            await copyPatchFiles({
+            await copyProtocolFiles({
               destination: manifestDir,
               workspaces: project.workspaces,
               report,
+              parseDescriptor: (descriptor) => {
+                if (descriptor.range.startsWith('exec:')) {
+                  const parsed = parseSpec(descriptor.range);
+                  if (!parsed || !parsed.parentLocator) return;
+                  return {
+                    parentLocator: parsed.parentLocator,
+                    paths: [parsed.path],
+                  };
+                } else if (descriptor.range.startsWith('patch:')) {
+                  const {
+                    parentLocator,
+                    patchPaths: paths,
+                  } = patchUtils.parseDescriptor(descriptor);
+                  if (!parentLocator) return;
+                  return { parentLocator, paths };
+                }
+              },
             });
 
             await copyCacheMarkedFiles({
diff --git a/packages/docker-build/src/utils/copyPatchFiles.ts b/packages/docker-build/src/utils/copyProtocolFiles.ts
similarity index 76%
rename from packages/docker-build/src/utils/copyPatchFiles.ts
rename to packages/docker-build/src/utils/copyProtocolFiles.ts
index eda9418..0612dea 100644
--- a/packages/docker-build/src/utils/copyPatchFiles.ts
+++ b/packages/docker-build/src/utils/copyProtocolFiles.ts
@@ -1,18 +1,27 @@
-import { Report, structUtils, Workspace } from '@yarnpkg/core';
+import {
+  Descriptor,
+  Locator,
+  Report,
+  structUtils,
+  Workspace,
+} from '@yarnpkg/core';
 import { PortablePath, ppath, xfs } from '@yarnpkg/fslib';
-import { patchUtils } from '@yarnpkg/plugin-patch';
 
 // https://github.com/yarnpkg/berry/blob/d38d573/packages/plugin-patch/sources/patchUtils.ts#L10
 const BUILTIN_REGEXP = /^builtin<([^>]+)>$/;
 
-export default async function copyPatchFiles({
+export default async function copyProtocolFiles({
   destination,
   workspaces,
   report,
+  parseDescriptor,
 }: {
   destination: PortablePath;
   workspaces: Workspace[];
   report: Report;
+  parseDescriptor: (
+    descriptor: Descriptor,
+  ) => { parentLocator: Locator; paths: PortablePath[] } | undefined;
 }): Promise<void> {
   const copiedPaths = new Set<string>();
 
@@ -22,21 +31,18 @@ export default async function copyPatchFiles({
         ? structUtils.devirtualizeDescriptor(descriptor)
         : descriptor;
 
-      if (!patchDescriptor.range.startsWith('patch:')) continue;
+      const parsed = parseDescriptor(patchDescriptor);
+      if (!parsed) continue;
 
-      const { parentLocator, patchPaths } = patchUtils.parseDescriptor(
-        patchDescriptor,
-      );
+      const { parentLocator, paths } = parsed;
 
-      for (const path of patchPaths) {
+      for (const path of paths) {
         // Ignore builtin modules
         if (BUILTIN_REGEXP.test(path)) continue;
 
         // TODO: Handle absolute path
         if (ppath.isAbsolute(path)) continue;
 
-        if (!parentLocator) continue;
-
         // Get the workspace by parentLocator
         const parentWorkspace = ws.project.getWorkspaceByLocator(parentLocator);
 
diff --git a/packages/docker-build/src/utils/execUtils.ts b/packages/docker-build/src/utils/execUtils.ts
new file mode 100644
index 0000000..5e38953
--- /dev/null
+++ b/packages/docker-build/src/utils/execUtils.ts
@@ -0,0 +1,20 @@
+// Copy from @yarnpkg/plugin-exec
+// https://github.com/yarnpkg/berry/blob/63a77b5/packages/plugin-exec/sources/execUtils.ts
+
+import { Locator, structUtils } from '@yarnpkg/core';
+import { npath, PortablePath } from '@yarnpkg/fslib';
+
+export function parseSpec(
+  spec: string,
+): { parentLocator: Locator | null; path: PortablePath } | undefined {
+  const { params, selector } = structUtils.parseRange(spec);
+
+  const path = npath.toPortablePath(selector);
+
+  const parentLocator =
+    params && typeof params.locator === `string`
+      ? structUtils.parseLocator(params.locator)
+      : null;
+
+  return { parentLocator, path };
+}