# How to get the cool v8.18.0.15-2025-09-17-47ef361823 version?

**URL:** <https://racket.discourse.group/t/how-to-get-the-cool-v8-18-0-15-2025-09-17-47ef361823-version/3949>\
**Category:** Questions & Answers\
**Created:** [September 22, 2025, 7:21am UTC](https://racket.discourse.group/t/how-to-get-the-cool-v8-18-0-15-2025-09-17-47ef361823-version/3949 "2025-09-22T07:21:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![shhyou](https://avatars.discourse-cdn.com/v4/letter/s/ccd318/32.png) [@shhyou](https://racket.discourse.group/u/shhyou)\
**Post date:** [September 22, 2025, 7:21am UTC](https://racket.discourse.group/t/how-to-get-the-cool-v8-18-0-15-2025-09-17-47ef361823-version/3949/1 "2025-09-22T07:21:53Z")

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Only recently I noticed that building Racket from Git HEAD gave the cool commit-sha version. I suppose this has be added to Racket for a long time, but I still don't get the commit-sha versions when building the git clone on an old computer. What configuration file do I need to delete to enable this?

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<div class="post-metadata">

**Author:** ![shhyou](https://avatars.discourse-cdn.com/v4/letter/s/ccd318/32.png) [@shhyou](https://racket.discourse.group/u/shhyou)\
**Post date:** [October 1, 2025, 7:56am UTC](https://racket.discourse.group/t/how-to-get-the-cool-v8-18-0-15-2025-09-17-47ef361823-version/3949/2 "2025-10-01T07:56:00Z")

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To answer: a clone with previously built Racket contains a `config.rktd` file in `<REPO>/racket/etc`. Add an entry `automatic-development-build-stamp?` to the hash and set its value to `#t` before re-building Racket:

```scheme
#hash((automatic-development-build-stamp? . #t) ;; <- add this
      (catalogs . ("../share/pkgs-catalog" #f))
      (default-scope . "installation")
      (installation-name . "development")
      ...
      )

```