1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix b/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix
index 6ce924adf11..172f54bcd2a 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix
@@ -266,7 +266,7 @@ let
 
         irony = super.irony.overrideAttrs (old: {
           cmakeFlags = old.cmakeFlags or [ ] ++ [ "-DCMAKE_INSTALL_BINDIR=bin" ];
-          NIX_CFLAGS_COMPILE = "-UCLANG_RESOURCE_DIR";
+          env.NIX_CFLAGS_COMPILE = "-UCLANG_RESOURCE_DIR";
           preConfigure = ''
             cd server
           '';