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-rw-r--r--guix/build/gnu-build-system.scm7
1 files changed, 4 insertions, 3 deletions
diff --git a/guix/build/gnu-build-system.scm b/guix/build/gnu-build-system.scm
index 94a7d6bca8..47820aa02e 100644
--- a/guix/build/gnu-build-system.scm
+++ b/guix/build/gnu-build-system.scm
@@ -109,9 +109,10 @@ makefiles."
            (base (basename out))
            (dash (string-rindex base #\-)))
       ;; XXX: We'd rather use `package-name->name+version' or similar.
-      (if dash
-          (substring base 0 dash)
-          base)))
+      (string-drop (if dash
+                       (substring base 0 dash)
+                       base)
+                   (+ 1 (string-index base #\-)))))
 
   (let* ((prefix     (assoc-ref outputs "out"))
          (bindir     (assoc-ref outputs "bin"))