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-rw-r--r--pkgs/development/compilers/crystal/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index 88439d7e66d18..fb031eba18cbf 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -250,6 +250,7 @@ let
       meta = with lib; {
         inherit (binary.meta) platforms;
         description = "A compiled language with Ruby like syntax and type inference";
+        mainProgram = "crystal";
         homepage = "https://crystal-lang.org/";
         license = licenses.asl20;
         maintainers = with maintainers; [ david50407 manveru peterhoeg donovanglover ];