---
name: "crystal-tool-dependencies"
section: "1"
platform: "linux"
package: "crystal"
version: "1.22.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/crystal-tool-dependencies"
---

# crystal-tool-dependencies(1)

Show tree of required source files.

## NAME

crystal-tool-dependencies - Show tree of required source files.

## SYNOPSIS

**crystal tool dependencies** \[options\] \[programfile\]

## OPTIONS

- **-D** *FLAG*, **--define**=*FLAG*

  Define a compile-time flag. This is useful to conditionally define types, methods, or commands based on flags available at compile time.  The default flags are from the target triple given with `--target-triple` or the hosts default, if none is given.

- **-f** *FORMAT*, **--format**=*FORMAT*

  Output format 'tree' (default), 'flat', 'dot', or 'mermaid'.

- **-i** *PATH*, **--include**=*PATH*

  Include path in output.

- **-e** *PATH*, **--exclude**=*PATH*

  Exclude path in output.

- **--error-trace**

  Show full error trace.

- **--prelude**

  Specify prelude to use. The default one initializes the garbage collector. You can also use `--prelude=empty` to use no preludes. This can be useful for checking code generation for a specific source code file.

- **--verbose**

  Show skipped and heads of filtered paths