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-rw-r--r--gnu/packages/embedded.scm11
1 files changed, 10 insertions, 1 deletions
diff --git a/gnu/packages/embedded.scm b/gnu/packages/embedded.scm
index 2befdf31b3..f8684f46a2 100644
--- a/gnu/packages/embedded.scm
+++ b/gnu/packages/embedded.scm
@@ -237,7 +237,16 @@ library variant NEWLIB."
       (version (package-version xgcc))
       (source #f)
       (build-system trivial-build-system)
-      (arguments '(#:builder (mkdir %output)))
+      (arguments
+       '(#:modules ((guix build union))
+         #:builder
+         (begin
+           (use-modules (ice-9 match)
+                        (guix build union))
+           (match %build-inputs
+             (((names . directories) ...)
+              (union-build (assoc-ref %outputs "out")
+                           directories))))))
       (propagated-inputs
        `(("binutils" ,(cross-binutils "arm-none-eabi"))
          ("gcc" ,xgcc)