diff --git a/lib/cli/build/index.tsx b/lib/cli/build/index.tsx
index 86f4232..958e17c 100644
--- a/lib/cli/build/index.tsx
+++ b/lib/cli/build/index.tsx
@@ -33,12 +33,17 @@ export async function build(args: string[]) {
     );
   }
 
-  const { inProgress, done, unmount } = progress();
+  const { inProgress, done, fail, unmount } = progress();
   try {
     for (const workflowPath of workflowPaths) {
-      await inProgress(`Building ${workflowPath}`);
-      await _buildWorkflow(workflowPath);
-      await done(getBuildTargetPath(workflowPath));
+      try {
+        await inProgress(`Building ${workflowPath}`);
+        await _buildWorkflow(workflowPath);
+        await done(getBuildTargetPath(workflowPath));
+      } catch (error) {
+        await fail(workflowPath);
+        throw error;
+      }
     }
   } finally {
     unmount();
diff --git a/lib/cli/install/action-yaml.ts b/lib/cli/install/action-yaml.ts
index 044f4cd..4b6652e 100644
--- a/lib/cli/install/action-yaml.ts
+++ b/lib/cli/install/action-yaml.ts
@@ -1,7 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import { parse as parseYaml } from "yaml";
-import { getFileContent } from "../../internal/git";
+import { getFileContent } from "../lib/github";
 
 export type ActionYaml = {
   inputs?: Record<
diff --git a/lib/cli/install/commit.ts b/lib/cli/install/commit.ts
index ac9dbf8..8f66f39 100644
--- a/lib/cli/install/commit.ts
+++ b/lib/cli/install/commit.ts
@@ -1,6 +1,6 @@
 import * as fs from "node:fs";
 import path from "node:path";
-import { getCommit as getCommitFromGithub } from "../../internal/git";
+import { getCommit as getCommitFromGithub } from "../lib/github";
 
 type Cache = {
   commit: string;
diff --git a/lib/cli/install/index.tsx b/lib/cli/install/index.tsx
index 0732331..81848bc 100644
--- a/lib/cli/install/index.tsx
+++ b/lib/cli/install/index.tsx
@@ -6,7 +6,7 @@ import {
   saveActionsJson,
   saveActionsLockJson,
 } from "../../internal/actions";
-import { getLatestRelease } from "../../internal/git";
+import { getLatestRelease } from "../lib/github";
 import { success } from "../ui/Message";
 import { progress } from "../ui/Progress";
 import { type ActionYaml, downloadActionYaml } from "./action-yaml";
@@ -50,47 +50,59 @@ export async function install(args: string[]) {
     }
   }
 
-  const { inProgress, done, clear, unmount } = progress();
+  const { inProgress, fail, done, clear, unmount } = progress();
   try {
     for (const parsedAction of Object.values(targetActions)) {
       await inProgress(
         `Installing ${parsedAction.fullName}@${parsedAction.version}`,
       );
 
-      // get tag name
-      const tagName = await (async () => {
-        if (parsedAction.version == null || parsedAction.version === "latest") {
-          const latestRelease = await getLatestRelease(
+      try {
+        // get tag name
+        const tagName = await (async () => {
+          if (
+            parsedAction.version == null ||
+            parsedAction.version === "latest"
+          ) {
+            const latestRelease = await getLatestRelease(
+              parsedAction.owner,
+              parsedAction.repo,
+            );
+            return latestRelease.tag_name;
+          }
+          return parsedAction.version;
+        })();
+
+        // get commit by tag name
+        const sha = await (async () => {
+          const lockedSha =
+            actionsLockJson.actions[`${parsedAction.fullName}@${tagName}`];
+          if (lockedSha != null) return lockedSha;
+          return await getCommit(
             parsedAction.owner,
             parsedAction.repo,
+            tagName,
           );
-          return latestRelease.tag_name;
-        }
-        return parsedAction.version;
-      })();
-
-      // get commit by tag name
-      const sha = await (async () => {
-        const lockedSha =
-          actionsLockJson.actions[`${parsedAction.fullName}@${tagName}`];
-        if (lockedSha != null) return lockedSha;
-        return await getCommit(parsedAction.owner, parsedAction.repo, tagName);
-      })();
-
-      // update actions.json and actions-lock.json
-      actionsJson[parsedAction.fullName] = tagName;
-      actionsLockJson.actions[`${parsedAction.fullName}@${tagName}`] = sha;
-
-      // download action.yml
-      const actionYaml = await downloadActionYaml(
-        parsedAction.owner,
-        parsedAction.repo,
-        parsedAction.action,
-        sha,
-      );
-      actionYamls[parsedAction.fullName] = actionYaml;
-
-      await done(`${parsedAction.fullName}@${tagName}`);
+        })();
+
+        // update actions.json and actions-lock.json
+        actionsJson[parsedAction.fullName] = tagName;
+        actionsLockJson.actions[`${parsedAction.fullName}@${tagName}`] = sha;
+
+        // download action.yml
+        const actionYaml = await downloadActionYaml(
+          parsedAction.owner,
+          parsedAction.repo,
+          parsedAction.action,
+          sha,
+        );
+        actionYamls[parsedAction.fullName] = actionYaml;
+
+        await done(`${parsedAction.fullName}@${tagName}`);
+      } catch (error) {
+        await fail(`${parsedAction.fullName}@${parsedAction.version}`);
+        throw error;
+      }
     }
 
     await inProgress("Building type definitions...");
diff --git a/lib/cli/install/type-def.ts b/lib/cli/install/type-def.ts
index a6d19be..c0e8fdf 100644
--- a/lib/cli/install/type-def.ts
+++ b/lib/cli/install/type-def.ts
@@ -1,4 +1,4 @@
-import { toUpperCamelCase } from "../../internal/util";
+import { toUpperCamelCase } from "../lib/util";
 import type { ActionYaml } from "./action-yaml";
 
 const actionJs = `import * as fs from "node:fs";
diff --git a/lib/internal/git.ts b/lib/cli/lib/github.ts
similarity index 100%
rename from lib/internal/git.ts
rename to lib/cli/lib/github.ts
diff --git a/lib/internal/util.spec.ts b/lib/cli/lib/util.spec.ts
similarity index 100%
rename from lib/internal/util.spec.ts
rename to lib/cli/lib/util.spec.ts
diff --git a/lib/internal/util.ts b/lib/cli/lib/util.ts
similarity index 100%
rename from lib/internal/util.ts
rename to lib/cli/lib/util.ts
diff --git a/lib/cli/ui/Progress.tsx b/lib/cli/ui/Progress.tsx
index 39521ba..a5a1c20 100644
--- a/lib/cli/ui/Progress.tsx
+++ b/lib/cli/ui/Progress.tsx
@@ -1,7 +1,7 @@
 import { render, Static, Text } from "ink";
 import Spinner from "./Spinner";
 
-export type ProgressStatus = "in-progress" | "done";
+export type ProgressStatus = "in-progress" | "done" | "fail";
 
 export type ProgressProps = {
   status: ProgressStatus;
@@ -32,6 +32,24 @@ export default function Progress({ status, title }: ProgressProps) {
       </Static>
     );
   }
+
+  if (status === "fail") {
+    return (
+      <Static items={[title]}>
+        {(title) => (
+          <Text key={title}>
+            <Text color="red" bold>
+              ✗
+            </Text>
+            <Text color="red" bold>
+              {" "}
+              {title}
+            </Text>
+          </Text>
+        )}
+      </Static>
+    );
+  }
 }
 
 export function progress() {
@@ -45,6 +63,9 @@ export function progress() {
     done: async (title: string) => {
       rerender(<Progress status="done" title={title} />);
     },
+    fail: async (title: string) => {
+      rerender(<Progress status="fail" title={title} />);
+    },
     clear: async () => {
       rerender(null);
       await new Promise((resolve) => setTimeout(resolve)); // wait for the message to be cleared