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Diffstat (limited to 'nixpkgs/pkgs/development/libraries/mbedtls/default.nix')
-rw-r--r--nixpkgs/pkgs/development/libraries/mbedtls/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/libraries/mbedtls/default.nix b/nixpkgs/pkgs/development/libraries/mbedtls/default.nix
index 90e2c9bd9a73..9210f18ed962 100644
--- a/nixpkgs/pkgs/development/libraries/mbedtls/default.nix
+++ b/nixpkgs/pkgs/development/libraries/mbedtls/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   strictDeps = true;
 
-  postConfigure = lib.optionals enableThreading ''
+  postConfigure = lib.optionalString enableThreading ''
     perl scripts/config.pl set MBEDTLS_THREADING_C    # Threading abstraction layer
     perl scripts/config.pl set MBEDTLS_THREADING_PTHREAD    # POSIX thread wrapper layer for the threading layer.
   '';