diff --git a/pkgs/development/libraries/bc-decaf/default.nix b/pkgs/development/libraries/bc-decaf/default.nix
index acfd0e85d4f4..c73f28e4e93a 100644
--- a/pkgs/development/libraries/bc-decaf/default.nix
+++ b/pkgs/development/libraries/bc-decaf/default.nix
@@ -7,7 +7,7 @@
 
 stdenv.mkDerivation rec {
   pname = "bc-decaf";
-  version = "linphone-4.4.1";
+  version = "unstable-2022-07-20";
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [
@@ -19,8 +19,8 @@ stdenv.mkDerivation rec {
     group = "BC";
     owner = "public/external";
     repo = "decaf";
-    rev = "6e78a9beb24d1e3d7050dd52a65e4f88b101a1fc";
-    sha256 = "sha256-D2SzkinloL0Ya9p25YUsc+7lKvoTMUsdkKrkv/5AEeY=";
+    rev = "876ddb4d465c94f97beba1be450e8538d866cc5d";
+    sha256 = "sha256-QFOAgLiPbG2ZdwKoCOrVD5/sPq9IH4rtAWnnk/rZWcs=";
   };
 
   # Do not build static libraries and do not enable -Werror