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-rw-r--r--pkgs/tools/system/efivar/default.nix3
1 files changed, 2 insertions, 1 deletions
diff --git a/pkgs/tools/system/efivar/default.nix b/pkgs/tools/system/efivar/default.nix
index ea0ed8afcfd0..afff716c249a 100644
--- a/pkgs/tools/system/efivar/default.nix
+++ b/pkgs/tools/system/efivar/default.nix
@@ -39,8 +39,9 @@ stdenv.mkDerivation rec {
       sha256 = "1ajj11wwsvamfspq4naanvw08h63gr0g71q0dfbrrywrhc0jlmdw";
     })
   ];
-  # We have no LTO here since commit 22284b07.
+  # We have no LTO here since commit 22284b07.  With GCC 10 that triggers a warning.
   postPatch = if stdenv.isi686 then "sed '/^OPTIMIZE /s/-flto//' -i Make.defaults" else null;
+  NIX_CFLAGS_COMPILE = if stdenv.isi686 then "-Wno-error=stringop-truncation" else null;
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ popt ];