diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index 11b6b3547e8..781c0d38ee6 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gfortran, perl, config, coreutils
+{ stdenv, fetchurl, gfortran, perl, which, config, coreutils
 # Most packages depending on openblas expect integer width to match pointer width,
 # but some expect to use 32-bit integers always (for compatibility with reference BLAS).
 , blas64 ? null
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
 
   inherit blas64;
 
-  nativeBuildInputs = optionals stdenv.isDarwin [coreutils] ++ [gfortran perl];
+  nativeBuildInputs = optionals stdenv.isDarwin [coreutils] ++ [gfortran perl which];
 
   makeFlags =
     (if local then localFlags else genericFlags)