src: switch to Python3

According to most recent changelog, src now explicitly requires Python3.

pkgs/applications/version-management/src/default.nix

@@ -1,4 +1,11 @@
-{ lib, stdenv, fetchurl, python2, rcs, git, makeWrapper }:
+{ lib
+, stdenv
+, fetchurl
+, python
+, rcs
+, git
+, makeWrapper
+}:
 
 stdenv.mkDerivation rec {
   pname = "src";
@@ -9,8 +16,15 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-Tc+qBhLtC9u23BrqVniAprAV8YhXELvbMn+XxN5BQkE=";
   };
 
-  nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ python2 rcs git ];
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
+  buildInputs = [
+    python
+    rcs
+    git
+  ];
 
   preConfigure = ''
     patchShebangs .
@@ -24,6 +38,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
+    homepage = "http://www.catb.org/esr/src/";
     description = "Simple single-file revision control";
     longDescription = ''
       SRC, acronym of Simple Revision Control, is RCS/SCCS reloaded with a
@@ -33,10 +48,9 @@ stdenv.mkDerivation rec {
       will seem familiar to Subversion/Git/hg users, and no binary blobs
       anywhere.
     '';
-    homepage = "http://www.catb.org/esr/src/";
     changelog = "https://gitlab.com/esr/src/raw/${version}/NEWS";
     license = licenses.bsd2;
-    platforms = platforms.all;
     maintainers = with maintainers; [ calvertvl AndersonTorres ];
+    inherit (python.meta) platforms;
   };
 }

pkgs/top-level/all-packages.nix

@@ -28734,6 +28734,7 @@ with pkgs;
 
   src = callPackage ../applications/version-management/src {
     git = gitMinimal;
+    python = python3;
   };
 
   sslyze = with python3Packages; toPythonApplication sslyze;