diff --git a/pkgs/development/python-modules/cirq-rigetti/default.nix b/pkgs/development/python-modules/cirq-rigetti/default.nix
index f09f7ce04539..be0ec040995b 100644
--- a/pkgs/development/python-modules/cirq-rigetti/default.nix
+++ b/pkgs/development/python-modules/cirq-rigetti/default.nix
@@ -31,20 +31,22 @@ buildPythonPackage rec {
 
   sourceRoot = "${src.name}/${pname}";
 
+  pythonRelaxDeps = [
+    "attrs"
+    "certifi"
+    "h11"
+    "httpcore"
+    "httpx"
+    "idna"
+    "iso8601"
+    "pydantic"
+    "pyjwt"
+    "pyquil"
+    "qcs-api-client"
+    "rfc3986"
+  ];
+
   postPatch = ''
-    substituteInPlace requirements.txt \
-      --replace "attrs~=20.3.0" "attrs" \
-      --replace "certifi~=2021.5.30" "certifi" \
-      --replace "h11~=0.9.0" "h11" \
-      --replace "httpcore~=0.11.1" "httpcore" \
-      --replace "httpx~=0.15.5" "httpx" \
-      --replace "idna~=2.10" "idna" \
-      --replace "pyjwt~=1.7.1" "pyjwt" \
-      --replace "qcs-api-client~=0.8.0" "qcs-api-client" \
-      --replace "iso8601~=0.1.14" "iso8601" \
-      --replace "rfc3986~=1.5.0" "rfc3986" \
-      --replace "pyquil~=3.0.0" "pyquil" \
-      --replace "pydantic~=1.8.2" "pydantic"
     # Remove outdated test
     rm cirq_rigetti/service_test.py
   '';