diff --git a/python-client/build.sh b/python-client/build.sh
index 4224f77bad..7abcd92a09 100755
--- a/python-client/build.sh
+++ b/python-client/build.sh
@@ -1,31 +1,28 @@
 #!/usr/bin/env bash
+
 set -e
 
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    sed() {
+        gsed "$@"
+    }
+fi
+
 mkdir openapi || true
 # cp  ../backend/windmill-api/openapi.yaml openapi/openapi.yaml
 
 LEGACY_WILDCARD="\$ref: \"..\/..\/openflow.openapi.yaml#\/components\/schemas\""
 # We will need to use old syntax of openapi to maintain compatability with previous windmill-api versions.
 # If we use new format, many models use another namespace, thus make it not fully compatible with old versions
-if [[ "$OSTYPE" == "darwin"* ]]; then
-    # macOS version using perl
-    perl -0777 -pe "s/# -- INLINE START --\n.*?# -- INLINE END --\n/$LEGACY_WILDCARD\n/s" \
-        ../backend/windmill-api/openapi.yaml > openapi/openapi.yaml
-else
-    # Replace everything between markers with legacy wildcard
-    sed -z "
-        s/# -- INLINE START --\n.*# -- INLINE END --\n/$LEGACY_WILDCARD\n/g;
-    " ../backend/windmill-api/openapi.yaml > openapi/openapi.yaml
-fi
+
+# Replace everything between markers with legacy wildcard
+sed -z "
+    s/# -- INLINE START --\n.*# -- INLINE END --\n/$LEGACY_WILDCARD\n/g;
+" ../backend/windmill-api/openapi.yaml > openapi/openapi.yaml
 
 npx @redocly/openapi-cli@latest bundle openapi/openapi.yaml > openapi-bundled.yaml
 
-if [[ "$OSTYPE" == "darwin"* ]]; then
-    # sed -z is not supported on macOS, use perl instead
-    perl -0777 -pe 's/FlowModuleValue:/FlowModuleValue2:/g' openapi-bundled.yaml > openapi-decycled.yaml
-else
-  sed -z 's/FlowModuleValue:/FlowModuleValue2:/' openapi-bundled.yaml > openapi-decycled.yaml
-fi
+sed -z 's/FlowModuleValue:/FlowModuleValue2:/' openapi-bundled.yaml > openapi-decycled.yaml
 
 echo "    FlowModuleValue: {}" >> openapi-decycled.yaml
 npx @redocly/openapi-cli@latest bundle openapi-decycled.yaml --ext json -d > openapi-deref.json
@@ -41,18 +38,9 @@ rm openapi*
 
 cp LICENSE windmill-api/
 
-# Check if running on macOS
-if [[ "$OSTYPE" == "darwin"* ]]; then
-    # macOS version
-    sed -i '' '5 i\
-license = "Apache-2.0"' windmill-api/pyproject.toml
-    sed -i '' 's/authors = \[\]/\nauthors = \["Ruben Fiszel <ruben@windmill.dev>"\]/g' windmill-api/pyproject.toml
-else
-    # Linux version
-    sed -i '5 i license = "Apache-2.0"' windmill-api/pyproject.toml
+sed -i '5 i license = "Apache-2.0"' windmill-api/pyproject.toml
 
-    sed -i 's/authors = \[\]/authors = \["Ruben Fiszel <ruben@windmill.dev>"\]/g' windmill-api/pyproject.toml
-fi
+sed -i 's/authors = \[\]/authors = \["Ruben Fiszel <ruben@windmill.dev>"\]/g' windmill-api/pyproject.toml
 
 echo "# Autogenerated Windmill OpenApi Client" >> windmill-api/README.md.tmp
 echo "This is the raw autogenerated api client. You are most likely more interested \