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Diffstat (limited to 'pkgs/development/compilers/ghcjs-ng/README.md')
| -rw-r--r-- | pkgs/development/compilers/ghcjs-ng/README.md | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/pkgs/development/compilers/ghcjs-ng/README.md b/pkgs/development/compilers/ghcjs-ng/README.md new file mode 100644 index 0000000000000..3e1598c83b05a --- /dev/null +++ b/pkgs/development/compilers/ghcjs-ng/README.md @@ -0,0 +1,20 @@ +New build system for GHCJS 8.2 +--- + +`ghcjs-8.2` reworked the build system, and now comes with its own +small package set of dependencies. This involves autogenerating +several sources and cabal files, based on a GHC +checkout. `callCabal2nix` is off limits, since we don't like "import +from derivation" in nixpkgs. So there is a derivation that builds the +nix expression that should be checked in whenever GHCJS is updated. + +Updating +--- + +``` +$ nix-prefetch-git https://github.com/ghcjs/ghcjs --rev refs/heads/ghc-8.2 \ + | jq '{ url, rev, fetchSubmodules, sha256 }' \ + > 8.2/git.json +$ cat $(nix-build ../../../.. -A haskell.compiler.ghcjs82.genStage0 --no-out-link) > 8.2/stage0.nix +``` + |