diff --git a/pkgs/data/fonts/input-fonts/default.nix b/pkgs/data/fonts/input-fonts/default.nix
index 9956325e15b..36a18c1f8f1 100644
--- a/pkgs/data/fonts/input-fonts/default.nix
+++ b/pkgs/data/fonts/input-fonts/default.nix
@@ -1,31 +1,76 @@
-{ lib, stdenv, requireFile, unzip }:
+{ lib
+, stdenv
+, fetchzip
+, python3
+, config
+, acceptLicense ? config.input-fonts.acceptLicense or false
+}:
 
-stdenv.mkDerivation {
+let
+
+  throwLicense = throw ''
+    Input is available free of charge for private/unpublished usage. This includes things like your personal coding app or for composing plain text documents.
+    To use it, you need to agree to its license: https://input.djr.com/license/
+
+    You can express acceptance by setting acceptLicense to true in your
+    configuration. Note that this is not a free license so it requires allowing
+    unfree licenses.
+
+    configuration.nix:
+      nixpkgs.config.allowUnfree = true;
+      nixpkgs.config.input-fonts.acceptLicense = true;
+
+    config.nix:
+      allowUnfree = true;
+      input-fonts.acceptLicense = true;
+
+    If you would like to support this project, consider purchasing a license at <http://input.djr.com/buy>.
+  '';
+
+  releaseDate = "2015-06-24";
+
+in
+
+stdenv.mkDerivation rec {
   pname = "input-fonts";
-  version = "2019-11-25"; # date of the download and checksum
+  version = "1.2";
 
-  src = requireFile {
-    name = "Input-Font.zip";
-    url = "https://input.fontbureau.com/download/";
-    sha256 = "10rax2a7vzidcs7kyfg5lv5bwp9i7kvjpdcsd10p0517syijkp3b";
-  };
+  src =
+    assert !acceptLicense -> throwLicense;
+    fetchzip {
+      name = "input-fonts-${version}";
+      # Add .zip parameter so that zip unpackCmd can match it.
+      url = "https://input.djr.com/build/?fontSelection=whole&a=0&g=0&i=0&l=0&zero=0&asterisk=0&braces=0&preset=default&line-height=1.2&accept=I+do&email=&.zip";
+      sha256 = "BESZ4Bjgm2hvQ7oPpMvYSlE8EqvQjqHZtXWIovqyIzA=";
+      stripRoot = false;
 
-  nativeBuildInputs = [ unzip ];
+      extraPostFetch = ''
+        # Reset the timestamp to release date for determinism.
+        PATH=${lib.makeBinPath [ python3.pkgs.fonttools ]}:$PATH
+        for ttf_file in $out/Input_Fonts/*/*/*.ttf; do
+          ttx_file=$(dirname "$ttf_file")/$(basename "$ttf_file" .ttf).ttx
+          ttx "$ttf_file"
+          rm "$ttf_file"
+          touch -m -t ${builtins.replaceStrings [ "-" ] [ "" ] releaseDate}0000 "$ttx_file"
+          ttx --recalc-timestamp "$ttx_file"
+          rm "$ttx_file"
+        done
+      '';
+    };
 
-  phases = [ "unpackPhase" "installPhase" ];
-
-  sourceRoot = ".";
+  dontConfigure = true;
+  dontBuild = true;
 
   installPhase = ''
+    runHook preInstall
+
     mkdir -p $out/share/fonts/truetype
     find Input_Fonts -name "*.ttf" -exec cp -a {} "$out"/share/fonts/truetype/ \;
     mkdir -p "$out"/share/doc
     cp -a *.txt "$out"/share/doc/
-  '';
 
-  outputHashAlgo = "sha256";
-  outputHashMode = "recursive";
-  outputHash = "15sdhqqqd4jgk80fw7ncx49avi9cxbdgyrvnrfya0066x4q4r6lv";
+    runHook postInstall
+  '';
 
   meta = with lib; {
     description = "Fonts for Code, from Font Bureau";
@@ -42,9 +87,12 @@ stdenv.mkDerivation {
       generous spacing, large punctuation, and easily distinguishable
       characters — but without the limitations of a fixed width.
     '';
-    homepage = "https://input.fontbureau.com";
+    homepage = "https://input.djr.com/";
     license = licenses.unfree;
-    maintainers = with maintainers; [ romildo ];
+    maintainers = with maintainers; [
+      jtojnar
+      romildo
+    ];
     platforms = platforms.all;
   };
 }