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-rw-r--r--pkgs/build-support/alternatives/blas/default.nix4
1 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/build-support/alternatives/blas/default.nix b/pkgs/build-support/alternatives/blas/default.nix
index bdee6688a74..5ebbc737e11 100644
--- a/pkgs/build-support/alternatives/blas/default.nix
+++ b/pkgs/build-support/alternatives/blas/default.nix
@@ -70,9 +70,9 @@ stdenv.mkDerivation {
     exit 1
   fi
 
-  nm -an "$libblas" | cut -f3 -d' ' > symbols
+  $NM -an "$libblas" | cut -f3 -d' ' > symbols
   for symbol in ${toString blasFortranSymbols}; do
-    grep "^$symbol_$" symbols || { echo "$symbol" was not found in "$libblas"; exit 1; }
+    grep -q "^$symbol_$" symbols || { echo "$symbol" was not found in "$libblas"; exit 1; }
   done
 
   cp -L "$libblas" $out/lib/libblas${canonicalExtension}