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-rw-r--r--gnu/packages/bootloaders.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/packages/bootloaders.scm b/gnu/packages/bootloaders.scm
index a3f436373d..98afc6a7c1 100644
--- a/gnu/packages/bootloaders.scm
+++ b/gnu/packages/bootloaders.scm
@@ -240,7 +240,7 @@ menu to select one of the installed operating systems.")
(build-system gnu-build-system)
(native-inputs
`(("bison" ,bison)
- ("flex" ,flex)))
+ ("flex" ,flex-2.6.1))) ; A bug in flex prevents building with flex-2.6.3.
(arguments
`(#:make-flags
(list "CC=gcc"