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-rw-r--r--lib/envars.ml3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/envars.ml b/lib/envars.ml
index 097ffe08e..a5eb827fe 100644
--- a/lib/envars.ml
+++ b/lib/envars.ml
@@ -18,7 +18,8 @@ let safe_getenv warning n =
("$"^n)
)
-let ( / ) = Filename.concat
+let ( / ) a b =
+ if Filename.is_relative b then Filename.concat a b else b
let coqify d = d / "coq"