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[!WARNING] After upgrading to Flox 1.19.1, we recommend rebooting your system to ensure full remediation.

Changes

  • Flox no longer sets SSL_CERT_FILE in activated environments, no longer copies your SSL_CERT_FILE into NIX_SSL_CERT_FILE, and no longer overrides a NIX_SSL_CERT_FILE, PATH_LOCALE or LOCALE_ARCHIVE you have set. When neither certificate variable is set, Flox sets NIX_SSL_CERT_FILE for Nix-built software only.
  • If your environment or a tool in it relied on the SSL_CERT_FILE Flox used to export, set it yourself in the manifest's [vars] section.

## Fixes

  • On Linux, Flox's bundled CA certificates now distrust four compromised roots (three emSign roots and the Comodo AAA Services root). macOS is unaffected because the system keychain governs trust there.
  • Environments built with Flox 1.19.0 or earlier no longer export an outdated SSL_CERT_FILE when activated. No rebuild is needed.
  • Container images built with flox containerize now carry the same CA bundle at /etc/ssl/certs as Flox itself, including Flox's distrust of compromised certificate authorities.
  • On Linux, activations, services, local builds, flox develop, flox run and extensions no longer inherit the SSL_CERT_FILE and SSL_CERT_DIR that Flox's TLS library wrote into the Flox process.

## Download Links

[!NOTE] You can find the SHA256 checksums for Flox 1.19.1 and SHA512 checksums for Flox 1.19.1 online.

Source: README.md, updated 2026-10-22