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-rw-r--r--gnu/packages/documentation.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/packages/documentation.scm b/gnu/packages/documentation.scm
index 6ce7827391..8e7ecda956 100644
--- a/gnu/packages/documentation.scm
+++ b/gnu/packages/documentation.scm
@@ -139,7 +139,7 @@ markup) can be customized and extended by the user.")
     (build-system cmake-build-system)
     (native-inputs
      `(("bison" ,bison)
-       ("flex" ,flex-2.6.1) ; sefaults with 2.6.4
+       ("flex" ,flex)
        ("libxml2" ,libxml2) ; provides xmllint for the tests
        ("python" ,python-2))) ; for creating the documentation
     (inputs