diff --git a/pkgs/development/python-modules/scipy/default.nix b/pkgs/development/python-modules/scipy/default.nix
index 6695910ba7a71..5f9e5017739d2 100644
--- a/pkgs/development/python-modules/scipy/default.nix
+++ b/pkgs/development/python-modules/scipy/default.nix
@@ -33,11 +33,9 @@ let
   #
   #     nix-shell maintainers/scripts/update.nix --argstr package python3.pkgs.scipy
   #
-  # Even if you do update these hashes manually, don't change their base
-  # (base16 or base64), because the update script uses sed regexes to replace
-  # them with the updated hashes.
-  version = "1.11.1";
-  srcHash = "sha256-bgnYXe3EhzL7+Gfriz1cXCl2eYQJ8zF+rcIwHyZR8bQ=";
+  # The update script uses sed regexes to replace them with the updated hashes.
+  version = "1.11.2";
+  srcHash = "sha256-7FE740/yKUXtujVX60fQB/xvCZFfV69FRihvSi6+UWo=";
   datasetsHashes = {
     ascent = "1qjp35ncrniq9rhzb14icwwykqg2208hcssznn3hz27w39615kh3";
     ecg = "1bwbjp43b7znnwha5hv6wiz3g0bhwrpqpi75s12zidxrbwvd62pj";
@@ -80,6 +78,7 @@ in buildPythonPackage {
     })
   ];
 
+  # Relax deps a bit
   postPatch = ''
     substituteInPlace pyproject.toml \
       --replace 'numpy==' 'numpy>=' \
@@ -117,9 +116,6 @@ in buildPythonPackage {
   doCheck = !(stdenv.isx86_64 && stdenv.isDarwin);
 
   preConfigure = ''
-    # Relax deps a bit
-    substituteInPlace pyproject.toml \
-      --replace 'numpy==' 'numpy>='
     # Helps parallelization a bit
     export NPY_NUM_BUILD_JOBS=$NIX_BUILD_CORES
     # We download manually the datasets and this variable tells the pooch
diff --git a/pkgs/development/python-modules/scipy/update.sh b/pkgs/development/python-modules/scipy/update.sh
index b0d6e2da4f41d..c6b3dca491864 100755
--- a/pkgs/development/python-modules/scipy/update.sh
+++ b/pkgs/development/python-modules/scipy/update.sh
@@ -16,10 +16,12 @@ if grep -q 'version = "'$version $fname; then
     echo "Current version $version is the latest available, will update only datasets' hashes (don't take long)"
 else
     echoerr got version $version
-    sed -i -E 's/(version = ).*=/\1'$version'/g' $fname
+    sed -i -E 's/(version = ").*(";)/\1'$version'\2/g' $fname
+    # Verify the sed command above did not fail
+    grep -q $version $fname
     # Update srcHash
-    srcHash='"sha256-'$(nix-prefetch-github scipy scipy --rev v${version} --fetch-submodules | jq --raw-output .sha256)'"'
-    sed -i 's/srcHash = .*=";/srcHash = '$srcHash';/g' $fname
+    srcHash="$(nix-prefetch-github scipy scipy --rev v${version} --fetch-submodules | jq --raw-output .hash)"
+    sed -i -E 's#(srcHash = ").*(";)#\1'$srcHash'\2#g' $fname
 fi
 
 for d in $datasets; do