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-rw-r--r--gnu/packages/games.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index 91e4861680..f7753352d6 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -1367,7 +1367,8 @@ built-in level editor.")
     (build-system gnu-build-system)
     (arguments
      '(#:make-flags
-       (list (string-append "PREFIX=" (assoc-ref %outputs "out")))
+       (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
+             "CXXFLAGS=-lpthread")
        #:phases
        (modify-phases %standard-phases
          ;; No configure script.