vhs doesn't work render commands in Android

**Describe the bug**
I'm trying to render a .tape file in Termux (Android) but it can't render commands. All I get is the promp indicator

**Setup**
- OS: Android
- Shell: bash

**To Reproduce**
Try to render example code in termux with vhs

*Source Code**
```
# Where should we write the GIF?
Output demo.gif

# Set up a 1200x600 terminal with 46px font.
Set FontSize 46
Set Width 1200
Set Height 600

# Type a command in the terminal.
Type "echo 'Welcome to VHS!'"

# Pause for dramatic effect...
Sleep 500ms

# Run the command by pressing enter.
Enter

# Admire the output for a bit.
Sleep 5s
```

**Screenshots**

This is the output of the command. It doesn't show any error:


This is the result:

Reproduce the supplied .tape example in Termux on Android with bash and compare the prompt-only output with the expected rendered commands and GIF. Trace the rendering path used by the vhs CLI on Android; done means the example renders its typed command and output rather than only the prompt.

Written by the indexing model from the issue text.