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Diffstat (limited to 'pkgs/applications/virtualization/OVMF/default.nix')
-rw-r--r--pkgs/applications/virtualization/OVMF/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/virtualization/OVMF/default.nix b/pkgs/applications/virtualization/OVMF/default.nix
index 8371a4715ad54..7350765ab5d2f 100644
--- a/pkgs/applications/virtualization/OVMF/default.nix
+++ b/pkgs/applications/virtualization/OVMF/default.nix
@@ -46,7 +46,7 @@ edk2.mkDerivation projectDscPath (finalAttrs: {
     ++ lib.optionals httpSupport [ "-D NETWORK_HTTP_ENABLE=TRUE" "-D NETWORK_HTTP_BOOT_ENABLE=TRUE" ]
     ++ lib.optionals tpmSupport [ "-D TPM_ENABLE" "-D TPM2_ENABLE" "-D TPM2_CONFIG_ENABLE"];
 
-  env.NIX_CFLAGS_COMPILE = lib.optional stdenv.cc.isClang "-Qunused-arguments";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Qunused-arguments";
 
   postPatch = lib.optionalString csmSupport ''
     cp ${seabios}/Csm16.bin OvmfPkg/Csm/Csm16/Csm16.bin