Please note we will close your issue without comment if you delete, do not read or do not fill out the issue checklist below and provide ALL the requested information. If you repeatedly fail to use the issue template, we will block you from ever submitting issues to Homebrew again.

Please always follow these steps:

• Confirmed this is a problem with running a brew command and not brew installing or the post-install behaviour of one or more formulae? If it's a formulae-specific problem please file this issue at the relevant tap e.g. for Homebrew/homebrew-core https://github.com/Homebrew/homebrew-core/issues/new

• Submitter's note: I believe this is a brew problem that manifests itself during post_install, so I thought I met this bullet. If not please let me know if there's a better place for me to submit.

• Ran brew update and retried your prior step?
• Ran brew doctor, fixed all issues and retried your prior step?
• Ran brew config and brew doctor and included their output with your issue?

To help us debug your issue please explain:

• What you were trying to do (and why)
• What happened (include command output)
• What you expected to happen
• Step-by-step reproduction instructions (by running brew commands)

Features

A cask I'm trying to install is failing because the Homebrew bin directory is not included in the PATH during its post_install step. This worked until recently but is giving us the following with Homebrew 1.4.2.

The cask we were using is dusty, so you should be able to repro with brew cask install dusty, though it's pretty heavyweight and installs Docker Toolbox as a dependency. The post_install of this cask will print out the PATH.

It looks like from #3576 and #3581 that it's still expected that the Homebrew bin dir be included in this PATH, but for whatever reason we're not getting it.

/usr/local is our HOMEBREW_PREFIX. The PATH of the user we're running brew as is:

/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

But the PATH during post_install is:

/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/Homebrew/Library/Homebrew/shims/scm

The full env of the user, in case it's useful:

SSH_AGENT_PID=2689
TERM_PROGRAM=Apple_Terminal
SHELL=/bin/bash
TERM=xterm-256color
TMPDIR=/var/folders/jz/g13f41n95c106mxy3p1v4fv00000gn/T/
Apple_PubSub_Socket_Render=/private/tmp/com.apple.launchd.v5EwzGaIHP/Render
TERM_PROGRAM_VERSION=400
TERM_SESSION_ID=D9A77ED6-40E6-451F-8AEE-7952A19A3407
USER=redacted_username
SSH_AUTH_SOCK=/var/folders/jz/g13f41n95c106mxy3p1v4fv00000gn/T//ssh-IQ1vzwLvRTmr/agent.2688
PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
PWD=/Users/redacted_username/Desktop
LANG=en_US.UTF-8
XPC_FLAGS=0x0
XPC_SERVICE_NAME=0
SHLVL=1
HOME=/Users/redacted_username
LOGNAME=redacted_username
_=/usr/bin/env
OLDPWD=/Users/redacted_username

brew config

HOMEBREW_VERSION: 1.4.2
ORIGIN: https://github.com/Homebrew/brew
HEAD: 4e08da95c34c27ba6d5ca5f80718fe2788337cdf
Last commit: 5 days ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 260006b775674e736785a27bef2410cbc45ea47d
Core tap last commit: 8 hours ago
HOMEBREW_PREFIX: /usr/local
CPU: octa-core 64-bit kabylake
Homebrew Ruby: 2.3.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby
Clang: 9.0 build 900
Git: 2.14.3 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 7.54.0 => /usr/bin/curl
Perl: /usr/bin/perl
Python: /usr/bin/python
Ruby: /usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby
Java: N/A
macOS: 10.13.2-x86_64
Xcode: N/A
CLT: 9.2.0.0.1.1510905681
X11: N/A

brew doctor

Your system is ready to brew.