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4,347 commits this week May 06, 2026 - May 13, 2026
hamishmack
hamishmack · · haskell.nix
comp-v2-builder: pass pname/version to slice mkDerivation, not name 
The cross-aware nixpkgs naming convention inserts the host platform's
`config` BETWEEN `pname` and `version` when both are set, giving
store-path names like `<pkg>-<ctype>-<cname>-<crossSuffix>-<version>`
(matching v1's `comp-builder.nix:528-530` shape).  Setting `name`
directly appends the cross suffix at the END instead, producing
`<pkg>-<ctype>-<cname>-<version>-<crossSuffix>`, which is silently
incompatible with consumers that mirror v1's naming — in particular
`tests.coverage.run`'s per-package coverage report expects
`pkgb-test-tests<crossSuffix>-0.1.0.0-check<crossSuffix>` (the cover.nix
output dir is keyed off the check derivation's `.name`).

Switch `buildCabalStoreSlice` to accept `pname` + `version`
separately (replacing the single `name` parameter) so v2 slice names
match v1's cross-aware shape.  The doc slice puts `-doc` in
`version` so the resulting drv name is
`<pkg>-<ctype>-<cname>-<crossSuffix>-<version>-doc` — same prefix
shape as the regular slice plus a distinguishing suffix.

Verified `tests.coverage.run` on `ghc984.musl32` (previously failed
on missing `.tix` path) plus `tests.dummy-ghc-info` on
`ghc9141` native + aarch64-multiplatform, `ghc9124` musl32 + ucrt64,
and `ghc967` native + musl64 (all still pass).
27abe69e · hkm/builder-v2 · 2/30 ++ 8 --
hamishmack
hamishmack · · haskell.nix
comp-v2-builder: wrap --with-PROG build-tool flags in --configure-option= 
`cabal v2-build` only accepts `--with-PROG=PATH` for a fixed set
of GHC-toolchain programs (`--with-ghc`, `--with-ghc-pkg`,
`--with-gcc`, ...); arbitrary `--with-<build-tool-exe>=PATH`
is rejected with "unrecognized 'v2-build' option".  Threading
each flag through `--configure-option=` makes cabal pass it to
per-package `Setup configure`, which DOES accept arbitrary
`--with-PROG=PATH` for any program declared as a build-tool.

This unblocks cross builds of slices whose deps have
`build-tool-depends:` on a non-GHC-toolchain executable
(e.g. `pkgb test-suite tests` depending on `pkga:pkga-exe` in
`tests.coverage.run` on `ghc984.musl32`).

Kept the flag at the cabal-CLI level rather than emitting a
`package *  configure-options:` block in cabal.project — the
latter enters EVERY package's `pkgHashConfigureOptions` and
forks the UnitId for packages that don't declare the
build-tool from what their own slice computed.  CLI-level flags
only contribute to the hash of packages that actually invoke
the program.
5da8b440 · hkm/builder-v2 · 2/38 ++ 20 --
Showing 25 of 4347 recent commits.