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-rw-r--r--guix/build/haskell-build-system.scm7
1 files changed, 5 insertions, 2 deletions
diff --git a/guix/build/haskell-build-system.scm b/guix/build/haskell-build-system.scm
index 91f62138d0..5fd0c7dbfe 100644
--- a/guix/build/haskell-build-system.scm
+++ b/guix/build/haskell-build-system.scm
@@ -121,9 +121,12 @@ and parameters ~s~%"
(setenv "GHC_PACKAGE_PATH" ghc-path)
#t))
-(define* (build #:rest empty)
+(define* (build #:key parallel-build? #:allow-other-keys)
"Build a given Haskell package."
- (run-setuphs "build" '()))
+ (run-setuphs "build"
+ (if parallel-build?
+ `(,(string-append "--ghc-option=-j" (number->string (parallel-job-count))))
+ '())))
(define* (install #:rest empty)
"Install a given Haskell package."