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-rw-r--r--pkgs/development/libraries/qrupdate/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/qrupdate/default.nix b/pkgs/development/libraries/qrupdate/default.nix
index f6c16583ad7..424502dce0d 100644
--- a/pkgs/development/libraries/qrupdate/default.nix
+++ b/pkgs/development/libraries/qrupdate/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
           -e 's,^LAPACK=.*,LAPACK=-L${lapack}/lib -llapack,' \
           Makeconf
     ''
-    + stdenv.lib.optionalString blas.is64bit
+    + stdenv.lib.optionalString blas.isILP64
     ''
       sed -i Makeconf -e '/^FFLAGS=.*/ s/$/-fdefault-integer-8/'
     '';