How to fix failed to solve with frontend dockerfile.v0: failed to create LLB definition: file with no instructions in Docker

DockerBEGINNERLOWUpdated Dec 6, 2025· 192 views

This Docker build error occurs when the Dockerfile is empty, contains only comments, or cannot be read due to encoding issues. Docker requires at least one valid instruction (like FROM) to build an image.

Quick fix

Fixes failed to solve with frontend dockerfile.v0: failed to create LLB definition: file with no instructions

# Check file exists and show size
ls -la Dockerfile

# Display file contents
cat Dockerfile
  1. Verify the Dockerfile exists and has content
  2. Ensure the Dockerfile is saved
  3. Check for encoding issues
  4. Fix line endings (Windows/Linux compatibility)
docker — error
# Check file exists and show size
ls -la Dockerfile
# Display file contents
cat Dockerfile
failed to solve with frontend dockerfile.v0: failed to create LLB definition: file with no instructions

What this error means

The "file with no instructions" error is a Docker build error that indicates Docker's build engine (BuildKit) cannot find any valid instructions in your Dockerfile. This error occurs during the LLB (Low-Level Builder) definition phase, before any actual build steps execute. Docker requires every Dockerfile to contain at least one valid instruction, with the most fundamental being the FROM instruction that specifies the base image. When Docker parses your Dockerfile and finds no recognizable instructions, it raises this error. This error is distinct from syntax errors because Docker isn't finding malformed instructions - it's finding no instructions at all. Common causes include empty files, files containing only comments, encoding issues that make the content unreadable, or Docker looking at the wrong file entirely.

Typical symptoms

  • Build fails immediately with 'file with no instructions' message
  • Error includes 'failed to create LLB definition' or 'failed to parse Dockerfile'
  • The build process stops before pulling any base images
  • Same Dockerfile builds successfully on another machine but fails locally
  • File appears to have content in editor but Docker reports it as empty

Common causes

  1. Dockerfile is empty (0 bytes) or was never saved after editing
  2. Dockerfile contains only comments with no actual instructions
  3. File encoding issues (UTF-16 instead of UTF-8, or BOM characters)
  4. Windows line endings (CRLF) causing parsing problems on some systems
  5. Docker is reading the wrong file (case sensitivity: dockerfile vs Dockerfile)
  6. Dockerfile has incorrect file permissions (especially in WSL2)
  7. Hidden or non-printable characters corrupting the file
  8. The build context path is incorrect, pointing to a directory without the Dockerfile

How to fix "failed to solve with frontend dockerfile.v0: failed to create LLB definition: file with no instructions"

1Verify the Dockerfile exists and has content

First, confirm your Dockerfile exists and contains actual instructions:

bash
# Check file exists and show size
ls -la Dockerfile

# Display file contents
cat Dockerfile

You should see instructions like FROM, RUN, COPY, etc. If the file is empty or shows nothing, you need to add content.

Minimum valid Dockerfile:

dockerfile
FROM alpine:latest
2Ensure the Dockerfile is saved

A common cause is editing a Dockerfile but forgetting to save it. Check your text editor:

1. Look for unsaved file indicators (dot or asterisk in tab title)
2. Press Ctrl+S (Windows/Linux) or Cmd+S (Mac) to save
3. Re-run your Docker build command

In VS Code, check the bottom status bar - unsaved files show a dot next to the filename.

3Check for encoding issues

File encoding problems can make content invisible to Docker. Check and fix encoding:

bash
# Check file encoding
file Dockerfile

Expected output: Dockerfile: ASCII text or Dockerfile: UTF-8 Unicode text

If you see UTF-16, UTF-32, or unusual encoding, convert it:

Using iconv:

bash
iconv -f UTF-16 -t UTF-8 Dockerfile > Dockerfile.new
mv Dockerfile.new Dockerfile

In VS Code:
1. Click the encoding in the bottom status bar (e.g., "UTF-16 LE")
2. Select "Save with Encoding"
3. Choose "UTF-8"

4Fix line endings (Windows/Linux compatibility)

Windows uses CRLF line endings while Linux uses LF. This can cause parsing issues:

bash
# Check for Windows line endings
cat -A Dockerfile | head -5

If you see ^M at the end of lines, you have Windows line endings.

Fix with dos2unix:

bash
dos2unix Dockerfile

Fix with sed:

bash
sed -i 's/\r$//' Dockerfile

Fix in VS Code:
1. Click "CRLF" in the bottom status bar
2. Select "LF"
3. Save the file

5Verify you're using the correct Dockerfile

Docker may be looking at a different file than you expect:

bash
# List all Dockerfile variants in current directory
ls -la Dockerfile* dockerfile*

Common naming issues:
- Linux is case-sensitive: dockerfile and Dockerfile are different files
- Docker defaults to Dockerfile (capital D)
- Hidden files: .Dockerfile won't be found

Explicitly specify the Dockerfile:

bash
docker build -f ./Dockerfile -t myimage .

For docker-compose, specify in your compose file:

yaml
services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
6Check file permissions (WSL2 and Linux)

On Linux and WSL2, file permissions can prevent Docker from reading the Dockerfile:

bash
# Check permissions
ls -la Dockerfile

# Fix permissions if needed
chmod 644 Dockerfile

WSL2 specific: Files copied directly from Windows Explorer to Ubuntu may have blank permissions:

bash
# Recreate the file in WSL
cat Dockerfile > Dockerfile.new
mv Dockerfile.new Dockerfile
7Verify the build context path

Ensure Docker can find your Dockerfile in the build context:

bash
# Build from current directory (Dockerfile must be here)
docker build -t myimage .

# Build with explicit context path
docker build -t myimage -f /path/to/Dockerfile /path/to/context

Check your current directory:

bash
pwd
ls -la Dockerfile

Make sure you're in the directory containing your Dockerfile, or use the -f flag to specify its location.

8Recreate the Dockerfile from scratch

If other solutions don't work, recreate the Dockerfile to eliminate any hidden issues:

bash
# Backup existing file
mv Dockerfile Dockerfile.bak

# Create new file with known-good content
cat > Dockerfile << 'EOF'
FROM alpine:latest
CMD ["echo", "Hello World"]
EOF

# Test the build
docker build -t test .

If this works, gradually copy your original instructions back, testing after each addition to identify which line causes problems.

Advanced notes

Understanding the LLB Definition:
LLB (Low-Level Builder) is BuildKit's intermediate representation for build operations. When Docker parses your Dockerfile, it converts instructions into LLB operations. The "failed to create LLB definition" error means this conversion failed at the very first step - there was nothing to convert.

BuildKit vs Legacy Builder:
This specific error message is from BuildKit (Docker's modern build engine). The legacy builder shows a slightly different message: "failed to parse Dockerfile: file with no instructions". Both mean the same thing.

To test with the legacy builder:

bash
DOCKER_BUILDKIT=0 docker build -t myimage .

Editor-specific Issues:
- VS Code: May save as UTF-16 by default on some systems. Check encoding in the status bar.
- Notepad (Windows): Adds BOM (Byte Order Mark) to UTF-8 files. Use Notepad++ or VS Code instead.
- Vim: Use :set fileencoding=utf-8 and :set fileformat=unix before saving.

CI/CD Considerations:
If builds work locally but fail in CI:
1. Check how the Dockerfile is created (templating, copying from artifacts)
2. Verify the file exists in the build context
3. Check for encoding differences between local and CI environments
4. Ensure any secrets injection isn't corrupting the file

Docker Compose Specifics:
When using docker-compose, ensure each service with a build: section has access to a valid Dockerfile:

yaml
services:
  app:
    build:
      context: ./app
      dockerfile: Dockerfile  # Must exist in ./app/

Frequently asked questions

What does "failed to solve with frontend dockerfile.v0: failed to create LLB defi" mean?
The "file with no instructions" error is a Docker build error that indicates Docker's build engine (BuildKit) cannot find any valid instructions in your Dockerfile. This error occurs during the LLB (Low-Level Builder) definition phase, before any actual build steps execute. Docker requires every Dockerfile to contain at least one valid instruction, with the most fundamental being the FROM instruction that specifies the base image.
How do I fix "failed to solve with frontend dockerfile.v0: failed to create LLB defi"?
This Docker build error occurs when the Dockerfile is empty, contains only comments, or cannot be read due to encoding issues. Docker requires at least one valid instruction (like FROM) to build an image.
What causes "failed to solve with frontend dockerfile.v0: failed to create LLB defi"?
Dockerfile is empty (0 bytes) or was never saved after editing Dockerfile contains only comments with no actual instructions File encoding issues (UTF-16 instead of UTF-8, or BOM characters)
Is the "failed to solve with frontend dockerfile.v0: failed to create LLB defi" error serious?
It is a low-severity error — more of a blocker than a risk. The steps above resolve it.

Official resources & further reading