diff --git a/dist/index.js b/dist/index.js
index fe6c47f..ccb9a46 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -36725,11 +36725,45 @@ async function dep() {
 	let phpBin = "php";
 	const phpBinArg = getInput("php-binary");
 	if (phpBinArg !== "") phpBin = phpBinArg;
+	const commandArgs = [
+		...cmd,
+		...recipeArgs,
+		"--no-interaction",
+		ansi,
+		...verbosityArgs,
+		...options
+	];
 	try {
-		await $`${phpBin} ${bin} ${cmd} ${recipeArgs} --no-interaction ${ansi} ${verbosityArgs} ${options}`;
+		await $`${phpBin} ${bin} ${commandArgs}`;
 	} catch (err) {
-		setFailed(`Failed: dep ${cmd}`);
+		throw new Error(formatCommandError(err, phpBin, bin, commandArgs));
 	}
 }
+function formatCommandError(err, phpBin, deployerBin, args) {
+	const command = [
+		phpBin,
+		deployerBin,
+		...args
+	].join(" ");
+	const details = getCommandErrorDetails(err);
+	return `Failed to run Deployer command:\n${command}${isMissingCommandError(err) ? "\n\nA command needed to start Deployer was not found. Verify PHP is installed and the \"deployer-binary\" input points to an existing Deployer PHAR/binary, or set \"deployer-version\" so this action can download Deployer." : ""}${details}`;
+}
+function getCommandErrorDetails(err) {
+	if (!(err instanceof Error)) return `\n\nOriginal error: ${String(err)}`;
+	const commandError = err;
+	const output = [commandError.stderr?.trim(), commandError.stdout?.trim()].filter(Boolean).join("\n");
+	if (output !== "") return `\n\nCommand output:\n${output}`;
+	return `\n\nOriginal error: ${err.message}`;
+}
+function isMissingCommandError(err) {
+	if (!(err instanceof Error)) return false;
+	const commandError = err;
+	const output = [
+		commandError.stderr,
+		commandError.stdout,
+		err.message
+	].filter(Boolean).join("\n");
+	return commandError.code === "ENOENT" || output.includes("ENOENT") || output.includes("No such file or directory") || output.includes("Could not open input file");
+}
 //#endregion
 export {};
diff --git a/src/index.ts b/src/index.ts
index 3864887..dd417e6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,6 +13,12 @@ interface DeployerManifestEntry {
   url: string
 }
 
+interface CommandError extends Error {
+  code?: string
+  stdout?: string
+  stderr?: string
+}
+
 void (async function main(): Promise<void> {
   try {
     await ssh()
@@ -161,9 +167,67 @@ async function dep(): Promise<void> {
     phpBin = phpBinArg
   }
 
+  const commandArgs = [
+    ...cmd,
+    ...recipeArgs,
+    '--no-interaction',
+    ansi,
+    ...verbosityArgs,
+    ...options,
+  ]
   try {
-    await $`${phpBin} ${bin} ${cmd} ${recipeArgs} --no-interaction ${ansi} ${verbosityArgs} ${options}`
+    await $`${phpBin} ${bin} ${commandArgs}`
   } catch (err) {
-    core.setFailed(`Failed: dep ${cmd}`)
+    throw new Error(formatCommandError(err, phpBin, bin, commandArgs))
+  }
+}
+
+function formatCommandError(
+  err: unknown,
+  phpBin: string,
+  deployerBin: string,
+  args: string[],
+): string {
+  const command = [phpBin, deployerBin, ...args].join(' ')
+  const details = getCommandErrorDetails(err)
+  const hint = isMissingCommandError(err)
+    ? '\n\nA command needed to start Deployer was not found. Verify PHP is installed and the "deployer-binary" input points to an existing Deployer PHAR/binary, or set "deployer-version" so this action can download Deployer.'
+    : ''
+
+  return `Failed to run Deployer command:\n${command}${hint}${details}`
+}
+
+function getCommandErrorDetails(err: unknown): string {
+  if (!(err instanceof Error)) {
+    return `\n\nOriginal error: ${String(err)}`
   }
+
+  const commandError = err as CommandError
+  const stderr = commandError.stderr?.trim()
+  const stdout = commandError.stdout?.trim()
+  const output = [stderr, stdout].filter(Boolean).join('\n')
+
+  if (output !== '') {
+    return `\n\nCommand output:\n${output}`
+  }
+
+  return `\n\nOriginal error: ${err.message}`
+}
+
+function isMissingCommandError(err: unknown): boolean {
+  if (!(err instanceof Error)) {
+    return false
+  }
+
+  const commandError = err as CommandError
+  const output = [commandError.stderr, commandError.stdout, err.message]
+    .filter(Boolean)
+    .join('\n')
+
+  return (
+    commandError.code === 'ENOENT' ||
+    output.includes('ENOENT') ||
+    output.includes('No such file or directory') ||
+    output.includes('Could not open input file')
+  )
 }