diff --git a/pkgs/tools/security/ioccheck/default.nix b/pkgs/tools/security/ioccheck/default.nix
index fc457e0c7fd4..2f25aa4ea897 100644
--- a/pkgs/tools/security/ioccheck/default.nix
+++ b/pkgs/tools/security/ioccheck/default.nix
@@ -13,7 +13,7 @@ let
           owner = "carpedm20";
           repo = "emoji";
           rev = "v${version}";
-          sha256 = "sha256-vKQ51RP7uy57vP3dOnHZRSp/Wz+YDzeLUR8JnIELE/I=";
+          hash = "sha256-vKQ51RP7uy57vP3dOnHZRSp/Wz+YDzeLUR8JnIELE/I=";
         };
       };
 
@@ -26,29 +26,35 @@ let
           owner = "tweepy";
           repo = "tweepy";
           rev = "v${version}";
-          sha256 = "0k4bdlwjna6f1k19jki4xqgckrinkkw8b9wihzymr1l04rwd05nw";
+          hash = "sha256-3BbQeCaAhlz9h5GnhficNubJHu4kTpnCDM4oKzlti0w=";
         };
         doCheck = false;
       };
     };
   };
-in
-with py.pkgs;
-
-buildPythonApplication rec {
+in py.pkgs.buildPythonApplication rec {
   pname = "ioccheck";
   version = "unstable-2021-09-29";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "ranguli";
-    repo = pname;
+    repo = "ioccheck";
     rev = "db02d921e2519b77523a200ca2d78417802463db";
     hash = "sha256-qf5tHIpbj/BfrzUST+EzohKh1hUg09KwF+vT0tj1+FE=";
   };
 
   nativeBuildInputs = with py.pkgs; [
     poetry-core
+    pythonRelaxDepsHook
+  ];
+
+  pythonRelaxDeps = [
+    "backoff"
+    "pyfiglet"
+    "tabulate"
+    "termcolor"
+    "vt-py"
   ];
 
   propagatedBuildInputs = with py.pkgs; [
@@ -73,11 +79,7 @@ buildPythonApplication rec {
   postPatch = ''
     # Can be removed with the next release
     substituteInPlace pyproject.toml \
-      --replace '"hurry.filesize" = "^0.9"' "" \
-      --replace 'vt-py = ">=0.6.1,<0.8.0"' 'vt-py = ">=0.6.1"' \
-      --replace 'backoff = "^1.10.0"' 'backoff = ">=1.10.0"' \
-      --replace 'termcolor = "^1.1.0"' 'termcolor = "*"' \
-      --replace 'tabulate = "^0.8.9"' 'tabulate = "*"'
+      --replace '"hurry.filesize" = "^0.9"' ""
   '';
 
   pythonImportsCheck = [