diff --git a/pkgs/build-support/alternatives/blas/default.nix b/pkgs/build-support/alternatives/blas/default.nix
index b771e182fe5a..ff15587779e0 100644
--- a/pkgs/build-support/alternatives/blas/default.nix
+++ b/pkgs/build-support/alternatives/blas/default.nix
@@ -115,7 +115,7 @@ EOF
   patchelf --set-rpath "$(patchelf --print-rpath $out/lib/libcblas${canonicalExtension}):${lib.getLib blasProvider}/lib" $out/lib/libcblas${canonicalExtension}
 '' else if stdenv.hostPlatform.isDarwin then ''
   install_name_tool \
-    -id libcblas${canonicalExtension} \
+    -id $out/lib/libcblas${canonicalExtension} \
     -add_rpath ${lib.getLib blasProvider}/lib \
     $out/lib/libcblas${canonicalExtension}
 '' else "") + ''