1 files changed, 9 insertions, 3 deletions
diff --git a/pkgs/tools/text/mdbook/default.nix b/pkgs/tools/text/mdbook/default.nix
index d3a136d6bf75..3ca4d0d8a559 100644
--- a/pkgs/tools/text/mdbook/default.nix
+++ b/pkgs/tools/text/mdbook/default.nix
@@ -2,19 +2,25 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "mdbook";
-  version = "0.4.12";
+  version = "0.4.15";
 
   src = fetchFromGitHub {
     owner = "rust-lang";
     repo = "mdBook";
     rev = "v${version}";
-    sha256 = "sha256-2lxotwL3Dc9jRA12iKO5zotO80pa+RfUZucyDRgFOsI=";
+    sha256 = "sha256-FYuai7YeqrnL5XgOV/EvxIRAu3TkeKJvKiDxnx94PJ8=";
   };
 
-  cargoSha256 = "sha256-TNd4pj4qSKgmmVtSCSKFCxNtv96xD7+24BPsLXPgiEI=";
+  cargoSha256 = "sha256-YWifpXrk+T8C3fGlURDKYWw7mD1TUjJbFHTlK84Tgpc=";
 
   buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
 
+  # Tests rely on unset 'RUST_LOG' value to emit INFO messages.
+  # 'RUST_LOG=' nixpkgs default enables warnings only and breaks tests.
+  # Can be removed when https://github.com/rust-lang/mdBook/pull/1777
+  # is released.
+  logLevel = "info";
+
   meta = with lib; {
     description = "Create books from MarkDown";
     homepage = "https://github.com/rust-lang/mdBook";