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-rw-r--r--pkgs/tools/package-management/nix/common.nix2
-rw-r--r--pkgs/tools/package-management/nix/default.nix4
2 files changed, 3 insertions, 3 deletions
diff --git a/pkgs/tools/package-management/nix/common.nix b/pkgs/tools/package-management/nix/common.nix
index 946407826f25e..670e2282aa20b 100644
--- a/pkgs/tools/package-management/nix/common.nix
+++ b/pkgs/tools/package-management/nix/common.nix
@@ -216,7 +216,7 @@ self = stdenv.mkDerivation {
   # Prevent crashes in libcurl due to invoking Objective-C `+initialize` methods after `fork`.
   # See http://sealiesoftware.com/blog/archive/2017/6/5/Objective-C_and_fork_in_macOS_1013.html.
   + lib.optionalString stdenv.isDarwin ''
-    export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=yes
+    export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
   ''
   # See https://github.com/NixOS/nix/issues/5687
   + lib.optionalString (atLeast25 && stdenv.isDarwin) ''
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 4652ddb76a5b4..c3f970f78fb39 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -238,8 +238,8 @@ in lib.makeExtensible (self: ({
   };
 
   nix_2_19 = common {
-    version = "2.19.2";
-    hash = "sha256-iA8DqS+W2fWTfR+nNJSvMHqQ+4NpYMRT3b+2zS6JTvE=";
+    version = "2.19.3";
+    hash = "sha256-EtL6M0H5+0mFbFh+teVjm+0B+xmHoKwtBvigS5NMWoo=";
   };
 
   # The minimum Nix version supported by Nixpkgs