diff --git a/pkgs/by-name/tt/ttop/lock.json b/pkgs/by-name/tt/ttop/lock.json
new file mode 100644
index 000000000000..16c54d52f980
--- /dev/null
+++ b/pkgs/by-name/tt/ttop/lock.json
@@ -0,0 +1,63 @@
+{
+  "depends": [
+    {
+      "method": "fetchzip",
+      "packages": [
+        "asciigraph"
+      ],
+      "path": "/nix/store/q3m2aqlzzrx4jj5akbf8rah0gp40ya2v-source",
+      "ref": "master",
+      "rev": "9f51fc4e94d0960ab63fa6ea274518159720aa69",
+      "sha256": "1n8cx5vl26ppjsn889zmfpa37yhlxahy2va4bqp6q4v4r1dl1h14",
+      "srcDir": "src",
+      "url": "https://github.com/Yardanico/asciigraph/archive/9f51fc4e94d0960ab63fa6ea274518159720aa69.tar.gz"
+    },
+    {
+      "method": "fetchzip",
+      "packages": [
+        "illwill"
+      ],
+      "path": "/nix/store/3lmm3z36qn4gz7bfa209zv0pqrpm3di9-source",
+      "ref": "v0.3.2",
+      "rev": "1d12cb36ab7b76c31d2d25fa421013ecb382e625",
+      "sha256": "0f9yncl5gbdja18mrqf5ixrdgrh95k0khda923dm1jd1x1b7ar8z",
+      "srcDir": "",
+      "url": "https://github.com/johnnovak/illwill/archive/1d12cb36ab7b76c31d2d25fa421013ecb382e625.tar.gz"
+    },
+    {
+      "method": "fetchzip",
+      "packages": [
+        "jsony"
+      ],
+      "path": "/nix/store/ila4vdklhqs6h14gwyx71yrjbzwf54g3-source",
+      "rev": "non_quoted_key",
+      "sha256": "03xg2psxk765rfbf77q0hw5p9j1lzx5aqgz0j6arknw6r3zjrvrm",
+      "srcDir": "src",
+      "url": "https://github.com/inv2004/jsony/archive/non_quoted_key.tar.gz"
+    },
+    {
+      "method": "fetchzip",
+      "packages": [
+        "parsetoml"
+      ],
+      "path": "/nix/store/nrgl7ks2x3svv6pkdxzr97d6jbd3zhlr-source",
+      "ref": "v0.7.1",
+      "rev": "6e5e16179fa2db60f2f37d8b1af4128aaa9c8aaf",
+      "sha256": "0lsgzbjlgd0h9859yn864y9h9h1v4f5jjk81yvfnlkc9zbwb5kfa",
+      "srcDir": "src",
+      "url": "https://github.com/NimParsers/parsetoml/archive/6e5e16179fa2db60f2f37d8b1af4128aaa9c8aaf.tar.gz"
+    },
+    {
+      "method": "fetchzip",
+      "packages": [
+        "zippy"
+      ],
+      "path": "/nix/store/dj520pi1q9xh5gplcjs0jsn5wgnaa0cr-source",
+      "ref": "0.10.11",
+      "rev": "9560f3d20479fb390c97f731ef8d100f1ed54e6c",
+      "sha256": "140r42kgynwsnrga4x2mildx9pflwniyhjjzmid2jvnl4i6jrsr4",
+      "srcDir": "src",
+      "url": "https://github.com/guzba/zippy/archive/9560f3d20479fb390c97f731ef8d100f1ed54e6c.tar.gz"
+    }
+  ]
+}
diff --git a/pkgs/tools/system/ttop/default.nix b/pkgs/by-name/tt/ttop/package.nix
similarity index 79%
rename from pkgs/tools/system/ttop/default.nix
rename to pkgs/by-name/tt/ttop/package.nix
index 694964daf9c3..97db97e33d44 100644
--- a/pkgs/tools/system/ttop/default.nix
+++ b/pkgs/by-name/tt/ttop/package.nix
@@ -1,9 +1,8 @@
-{ lib, nimPackages, fetchFromGitHub, testers }:
+{ lib, buildNimPackage, fetchFromGitHub, testers }:
 
-nimPackages.buildNimPackage (finalAttrs: {
+buildNimPackage (finalAttrs: {
   pname = "ttop";
   version = "1.2.7";
-  nimBinOnly = true;
 
   src = fetchFromGitHub {
     owner = "inv2004";
@@ -12,7 +11,7 @@ nimPackages.buildNimPackage (finalAttrs: {
     hash = "sha256-oPdaUqh6eN1X5kAYVvevOndkB/xnQng9QVLX9bu5P5E=";
   };
 
-  buildInputs = with nimPackages; [ asciigraph illwill jsony parsetoml zippy ];
+  lockFile = ./lock.json;
 
   nimFlags = [
     "-d:NimblePkgVersion=${finalAttrs.version}"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b0ccb0663e65..5c1f7d3f5f1f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14155,8 +14155,6 @@ with pkgs;
   };
   ttfautohint-nox = ttfautohint.override { enableGUI = false; };
 
-  ttop = callPackage ../tools/system/ttop { };
-
   tty-clock = callPackage ../tools/misc/tty-clock { };
 
   tty-share = callPackage ../applications/misc/tty-share { };
diff --git a/pkgs/top-level/nim-overrides.nix b/pkgs/top-level/nim-overrides.nix
index cf7a14b18d7d..28bd13375e0e 100644
--- a/pkgs/top-level/nim-overrides.nix
+++ b/pkgs/top-level/nim-overrides.nix
@@ -1,4 +1,5 @@
 { lib
+, stdenv
 , SDL2
 }:
 
@@ -13,4 +14,11 @@
       buildInputs = buildInputs ++ [ SDL2 ];
     };
 
+  zippy = lockAttrs: finalAttrs:
+    { nimFlags ? [ ], ... }: {
+      nimFlags = nimFlags ++ lib.optionals stdenv.hostPlatform.isx86_64 [
+        "--passC:-msse4.1"
+        "--passC:-mpclmul"
+      ];
+    };
 }