diff --git a/nixos/doc/manual/release-notes/rl-2103.xml b/nixos/doc/manual/release-notes/rl-2103.xml
index 2d0c5e39f7a..7fd7ff5c2a9 100644
--- a/nixos/doc/manual/release-notes/rl-2103.xml
+++ b/nixos/doc/manual/release-notes/rl-2103.xml
@@ -121,6 +121,11 @@
       <literal>/var/lib/powerdns</literal> to <literal>/run/pdns</literal>.
     </para>
    </listitem>
+   <listitem>
+    <para>
+    <package>btc1</package> has been abandoned upstream, and removed.
+    </para>
+   </listitem>
    <listitem>
     <para>
     <package>riak-cs</package> package removed along with <varname>services.riak-cs</varname> module.
diff --git a/pkgs/applications/blockchains/btc1.nix b/pkgs/applications/blockchains/btc1.nix
deleted file mode 100644
index 3442c9ba807..00000000000
--- a/pkgs/applications/blockchains/btc1.nix
+++ /dev/null
@@ -1,41 +0,0 @@
-{ stdenv, fetchurl, pkgconfig, autoreconfHook, hexdump, openssl, db48
-, boost, zlib, miniupnpc, qt4, protobuf, qrencode, libevent
-, AppKit
-, withGui ? !stdenv.isDarwin
-}:
-
-with stdenv.lib;
-stdenv.mkDerivation rec {
-  name = "bit1" + (toString (optional (!withGui) "d")) + "-" + version;
-  version = "1.15.1";
-
-  src = fetchurl {
-    url = "https://github.com/btc1/bitcoin/archive/v${version}.tar.gz";
-    sha256 = "0v0g2wb4nsnhddxzb63vj2bc1mgyj05vqm5imicjfz8prvgc0si8";
-  };
-
-  nativeBuildInputs = [ pkgconfig autoreconfHook hexdump ];
-  buildInputs = [ openssl db48 boost zlib miniupnpc protobuf libevent ]
-    ++ optionals withGui [ qt4 qrencode ]
-    ++ optional stdenv.isDarwin AppKit;
-
-  configureFlags = [ "--with-boost-libdir=${boost.out}/lib" ]
-                     ++ optionals withGui [ "--with-gui=qt4" ];
-
-  meta = {
-    description = "Peer-to-peer electronic cash system (btc1 client)";
-    longDescription= ''
-      Bitcoin is a free open source peer-to-peer electronic cash system that is
-      completely decentralized, without the need for a central server or trusted
-      parties. Users hold the crypto keys to their own money and transact directly
-      with each other, with the help of a P2P network to check for double-spending.
-
-      btc1 is an implementation of a Bitcoin full node with segwit2x hard fork
-      support.
-    '';
-    homepage = "https://github.com/btc1/bitcoin";
-    license = licenses.mit;
-    maintainers = with maintainers; [ sorpaas ];
-    platforms = platforms.unix;
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index defde7dcc0a..b87ce83fc9e 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -65,6 +65,7 @@ mapAliases ({
   bittorrentSync = throw "bittorrentSync has been deprecated by resilio-sync."; # added 2019-06-03
   bittorrentSync14 = throw "bittorrentSync14 has been deprecated by resilio-sync."; # added 2019-06-03
   bittorrentSync20 = throw "bittorrentSync20 has been deprecated by resilio-sync."; # added 2019-06-03
+  btc1 = throw "btc1 has been removed, it was abandoned by upstream"; # added 2020-11-03
   buildPerlPackage = perlPackages.buildPerlPackage; # added 2018-10-12
   buildGo112Package = throw "buildGo112Package has been removed"; # added 2020-04-26
   buildGo112Module = throw "buildGo112Module has been removed"; # added 2020-04-26
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5e0130cc1c1..4dc2f696225 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -24801,12 +24801,6 @@ in
   bitcoin-gold = libsForQt514.callPackage ../applications/blockchains/bitcoin-gold.nix { boost = boost165; withGui = true; };
   bitcoind-gold = callPackage ../applications/blockchains/bitcoin-gold.nix { boost = boost165; withGui = false; };
 
-  btc1 = callPackage ../applications/blockchains/btc1.nix {
-    inherit (darwin.apple_sdk.frameworks) AppKit;
-    boost = boost165;
-  };
-  btc1d = btc1.override { withGui = false; };
-
   btcpayserver = callPackage ../applications/blockchains/btcpayserver { };
 
   cryptop = python3.pkgs.callPackage ../applications/blockchains/cryptop { };