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-rw-r--r--nixpkgs/pkgs/tools/audio/kaldi/default.nix3
1 files changed, 3 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/tools/audio/kaldi/default.nix b/nixpkgs/pkgs/tools/audio/kaldi/default.nix
index 2d61a984a00d..ef725408b13e 100644
--- a/nixpkgs/pkgs/tools/audio/kaldi/default.nix
+++ b/nixpkgs/pkgs/tools/audio/kaldi/default.nix
@@ -54,6 +54,9 @@ stdenv.mkDerivation {
       # fix up this call:
       # https://github.com/kaldi-asr/kaldi/blob/c9d8b9ad3fef89237ba5517617d977b7d70a7ed5/cmake/VersionHelper.cmake#L8
       echo 0
+    elif [[ "$1" == "rev-parse" ]]; then
+      echo ${openfst.rev}
+      echo 0
     fi
     true
     EOF