diff --git a/scripts/generate-specs.sh b/scripts/generate-specs.sh
index cd0af210b404d3..ddac05baa1a827 100755
--- a/scripts/generate-specs.sh
+++ b/scripts/generate-specs.sh
@@ -10,14 +10,14 @@
 #
 # Optionally, set these envvars to override defaults:
 # - SRCS_DIR: Path to JavaScript sources
-# - CODEGEN_MODULES_LIBRARY_NAME: Defaults to FBReactNativeSpec
-# - CODEGEN_MODULES_OUTPUT_DIR: Defaults to React/$CODEGEN_MODULES_LIBRARY_NAME/$CODEGEN_MODULES_LIBRARY_NAME
-# - CODEGEN_COMPONENTS_LIBRARY_NAME: Defaults to rncore
-# - CODEGEN_COMPONENTS_OUTPUT_DIR: Defaults to ReactCommon/react/renderer/components/$CODEGEN_COMPONENTS_LIBRARY_NAME
+# - MODULES_LIBRARY_NAME: Defaults to FBReactNativeSpec
+# - MODULES_OUTPUT_DIR: Defaults to React/$MODULES_LIBRARY_NAME/$MODULES_LIBRARY_NAME
+# - COMPONENTS_LIBRARY_NAME: Defaults to rncore
+# - COMPONENTS_OUTPUT_DIR: Defaults to ReactCommon/react/renderer/components/$COMPONENTS_LIBRARY_NAME
 #
 # Usage:
 #   ./scripts/generate-specs.sh
-#   SRCS_DIR=myapp/js CODEGEN_MODULES_LIBRARY_NAME=MySpecs CODEGEN_MODULES_OUTPUT_DIR=myapp/MySpecs ./scripts/generate-specs.sh
+#   SRCS_DIR=myapp/js MODULES_LIBRARY_NAME=MySpecs MODULES_OUTPUT_DIR=myapp/MySpecs ./scripts/generate-specs.sh
 #
 
 # shellcheck disable=SC2038
@@ -46,13 +46,13 @@ describe () {
 
 main() {
   SRCS_DIR=${SRCS_DIR:-$(cd "$RN_DIR/Libraries" && pwd)}
-  CODEGEN_MODULES_LIBRARY_NAME=${CODEGEN_MODULES_LIBRARY_NAME:-FBReactNativeSpec}
+  MODULES_LIBRARY_NAME=${MODULES_LIBRARY_NAME:-FBReactNativeSpec}
 
-  CODEGEN_COMPONENTS_LIBRARY_NAME=${CODEGEN_COMPONENTS_LIBRARY_NAME:-rncore}
-  CODEGEN_MODULES_OUTPUT_DIR=${CODEGEN_MODULES_OUTPUT_DIR:-"$RN_DIR/React/$CODEGEN_MODULES_LIBRARY_NAME/$CODEGEN_MODULES_LIBRARY_NAME"}
-  # TODO: $CODEGEN_COMPONENTS_PATH should be programmatically specified, and may change with use_frameworks! support.
-  CODEGEN_COMPONENTS_PATH="ReactCommon/react/renderer/components"
-  CODEGEN_COMPONENTS_OUTPUT_DIR=${CODEGEN_COMPONENTS_OUTPUT_DIR:-"$RN_DIR/$CODEGEN_COMPONENTS_PATH/$CODEGEN_COMPONENTS_LIBRARY_NAME"}
+  COMPONENTS_LIBRARY_NAME=${COMPONENTS_LIBRARY_NAME:-rncore}
+  MODULES_OUTPUT_DIR=${MODULES_OUTPUT_DIR:-"$RN_DIR/React/$MODULES_LIBRARY_NAME/$MODULES_LIBRARY_NAME"}
+  # TODO: $COMPONENTS_PATH should be programmatically specified, and may change with use_frameworks! support.
+  COMPONENTS_PATH="ReactCommon/react/renderer/components"
+  COMPONENTS_OUTPUT_DIR=${COMPONENTS_OUTPUT_DIR:-"$RN_DIR/$COMPONENTS_PATH/$COMPONENTS_LIBRARY_NAME"}
 
   TEMP_OUTPUT_DIR="$TEMP_DIR/out"
   SCHEMA_FILE="$TEMP_DIR/schema.json"
@@ -84,14 +84,14 @@ main() {
 
   describe "Generating native code from schema (iOS)"
   pushd "$RN_DIR" >/dev/null || exit 1
-    "$NODE_BINARY" scripts/generate-specs-cli.js ios "$SCHEMA_FILE" "$TEMP_OUTPUT_DIR" "$CODEGEN_MODULES_LIBRARY_NAME"
+    "$NODE_BINARY" scripts/generate-specs-cli.js ios "$SCHEMA_FILE" "$TEMP_OUTPUT_DIR" "$MODULES_LIBRARY_NAME"
   popd >/dev/null || exit 1
 
   describe "Copying output to final directory"
-  mkdir -p "$CODEGEN_COMPONENTS_OUTPUT_DIR" "$CODEGEN_MODULES_OUTPUT_DIR"
-  cp -v -R "$TEMP_OUTPUT_DIR/$CODEGEN_MODULES_LIBRARY_NAME.h" "$TEMP_OUTPUT_DIR/$CODEGEN_MODULES_LIBRARY_NAME-generated.mm" "$CODEGEN_MODULES_OUTPUT_DIR" || exit 1
-  find "$TEMP_OUTPUT_DIR" -type f | xargs sed -i.bak "s/$CODEGEN_MODULES_LIBRARY_NAME/$CODEGEN_COMPONENTS_LIBRARY_NAME/g" || exit 1
-  find "$TEMP_OUTPUT_DIR" -type f -not -iname "$CODEGEN_MODULES_LIBRARY_NAME*" -exec cp -v '{}' "$CODEGEN_COMPONENTS_OUTPUT_DIR/" ';' || exit 1
+  mkdir -p "$COMPONENTS_OUTPUT_DIR" "$MODULES_OUTPUT_DIR"
+  cp -R "$TEMP_OUTPUT_DIR/$MODULES_LIBRARY_NAME.h" "$TEMP_OUTPUT_DIR/$MODULES_LIBRARY_NAME-generated.mm" "$MODULES_OUTPUT_DIR" || exit 1
+  find "$TEMP_OUTPUT_DIR" -type f | xargs sed -i.bak "s/$MODULES_LIBRARY_NAME/$COMPONENTS_LIBRARY_NAME/g" || exit 1
+  find "$TEMP_OUTPUT_DIR" -type f -not -iname "$MODULES_LIBRARY_NAME*" -exec cp '{}' "$COMPONENTS_OUTPUT_DIR/" ';' || exit 1
 
   echo >&2 'Done.'
 }
diff --git a/scripts/react_native_pods.rb b/scripts/react_native_pods.rb
index 2a2b04e2b350fa..d61f69da719cc4 100644
--- a/scripts/react_native_pods.rb
+++ b/scripts/react_native_pods.rb
@@ -148,33 +148,31 @@ def react_native_post_install(installer)
 def use_react_native_codegen!(spec, options={})
   return if ENV['DISABLE_CODEGEN'] == '1'
 
-  # The path to react-native (e.g. react_native_path)
-  prefix = options[:path] ||= File.join(__dir__, "..")
+  # The path to react-native
+  prefix = options[:path] ||= "${PODS_TARGET_SRCROOT}/../.."
 
   # The path to JavaScript files
-  srcs_dir = options[:srcs_dir] ||= File.join(prefix, "Libraries")
+  js_srcs = options[:js_srcs_dir] ||= "#{prefix}/Libraries"
 
   # Library name (e.g. FBReactNativeSpec)
-  codegen_modules_library_name = spec.name
-  codegen_modules_output_dir = options[:codegen_modules_output_dir] ||= File.join(prefix, "React/#{codegen_modules_library_name}/#{codegen_modules_library_name}")
+  modules_library_name = spec.name
+  modules_output_dir = "React/#{modules_library_name}/#{modules_library_name}"
 
   # Run the codegen as part of the Xcode build pipeline.
-  env_vars = "SRCS_DIR=#{srcs_dir}"
-  env_vars += " CODEGEN_MODULES_OUTPUT_DIR=#{codegen_modules_output_dir}"
+  env_vars = "SRCS_DIR=#{js_srcs}"
+  env_vars += " MODULES_OUTPUT_DIR=#{prefix}/#{modules_output_dir}"
+  env_vars += " MODULES_LIBRARY_NAME=#{modules_library_name}"
 
-  # Since the generated files are not guaranteed to exist when CocoaPods is run, we need to create
-  # empty files to ensure the references are included in the resulting Pods Xcode project.
-  mkdir_command = "mkdir -p #{codegen_modules_output_dir}"
-  generated_filenames = [ "#{codegen_modules_library_name}.h", "#{codegen_modules_library_name}-generated.mm" ]
-  generated_files = generated_filenames.map { |filename| File.join(codegen_modules_output_dir, filename) }
+  generated_dirs = [ modules_output_dir ]
+  generated_filenames = [ "#{modules_library_name}.h", "#{modules_library_name}-generated.mm" ]
+  generated_files = generated_filenames.map { |filename| "#{modules_output_dir}/#{filename}" }
 
   if ENV['USE_FABRIC'] == '1'
     # We use a different library name for components, as well as an additional set of files.
-    # Eventually, we want these to be part of the same library as #{codegen_modules_library_name} above.
-    codegen_components_library_name = "rncore"
-    codegen_components_output_dir = File.join(prefix, "ReactCommon/react/renderer/components/#{codegen_components_library_name}")
-    env_vars += " CODEGEN_COMPONENTS_OUTPUT_DIR=#{codegen_components_output_dir}"
-    mkdir_command += " #{codegen_components_output_dir}"
+    # Eventually, we want these to be part of the same library as #{modules_library_name} above.
+    components_output_dir = "ReactCommon/react/renderer/components/rncore/"
+    generated_dirs.push components_output_dir
+    env_vars += " COMPONENTS_OUTPUT_DIR=#{prefix}/#{components_output_dir}"
     components_generated_filenames = [
       "ComponentDescriptors.h",
       "EventEmitters.cpp",
@@ -185,17 +183,16 @@ def use_react_native_codegen!(spec, options={})
       "ShadowNodes.cpp",
       "ShadowNodes.h"
     ]
-    generated_files = generated_files.concat(components_generated_filenames.map { |filename| File.join(codegen_components_output_dir, filename) })
+    generated_files = generated_files.concat(components_generated_filenames.map { |filename| "#{components_output_dir}/#{filename}" })
   end
 
   spec.script_phase = {
     :name => 'Generate Specs',
-    :input_files => [srcs_dir],
-    :output_files => ["$(DERIVED_FILE_DIR)/codegen-#{codegen_modules_library_name}.log"].concat(generated_files),
-    :script => "set -o pipefail\n\nbash -l -c '#{env_vars} CODEGEN_MODULES_LIBRARY_NAME=#{codegen_modules_library_name} #{File.join(__dir__, "generate-specs.sh")}' 2>&1 | tee \"${SCRIPT_OUTPUT_FILE_0}\"",
+    :input_files => [js_srcs],
+    :output_files => ["${DERIVED_FILE_DIR}/codegen-#{modules_library_name}.log"].concat(generated_files.map { |filename| "#{prefix}/#{filename}"} ),
+    :script => "set -o pipefail\n\nbash -l -c '#{env_vars} ${PODS_TARGET_SRCROOT}/../../scripts/generate-specs.sh' 2>&1 | tee \"${SCRIPT_OUTPUT_FILE_0}\"",
     :execution_position => :before_compile,
     :show_env_vars_in_log => true
   }
-
-  spec.prepare_command = "#{mkdir_command} && touch #{generated_files.reduce() { |str, file| str + " " + file }}"
+  spec.prepare_command = "mkdir -p #{generated_dirs.reduce("") { |str, dir| "#{str} ../../#{dir}" }} && touch #{generated_files.reduce("") { |str, filename| "#{str} ../../#{filename}" }}"
 end