1 files changed, 4 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/libraries/tecla/default.nix b/nixpkgs/pkgs/development/libraries/tecla/default.nix
index 7163f24815c5..4c6ec8e01691 100644
--- a/nixpkgs/pkgs/development/libraries/tecla/default.nix
+++ b/nixpkgs/pkgs/development/libraries/tecla/default.nix
@@ -14,6 +14,10 @@ stdenv.mkDerivation rec {
       --replace "stripprog=" "stripprog=\$STRIP # "
   '';
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
+  };
+
   meta = {
     description = "Command-line editing library";
     homepage = "https://www.astro.caltech.edu/~mcs/tecla/";