@@ -88,8 +88,8 @@ def __init__(
         self.cmake_compiler_configurations.update(
             {
                 "CMAKE_BUILD_TYPE:STRING": f"{self._build_type}",
-                "CMAKE_CXX_FLAGS:STRING": "\"-O3 -DNDEBUG\"",
-                "CMAKE_C_FLAGS:STRING": "\"-O3 -DNDEBUG\"",
+                "CMAKE_CXX_FLAGS:STRING": '"-O3 -DNDEBUG"',
+                "CMAKE_C_FLAGS:STRING": '"-O3 -DNDEBUG"',
             }
         )
         # Set cmake flags for the compiler if CC or CXX are specified
 
@@ -67,8 +67,8 @@ def prepare_build_env(self) -> None:
         )
 
         # Keep values consistent with prior quoting behavior
-        self.cmake_compiler_configurations.set("CMAKE_CXX_FLAGS:STRING", "\"-O3 -DNDEBUG\"")
-        self.cmake_compiler_configurations.set("CMAKE_C_FLAGS:STRING", "\"-O3 -DNDEBUG\"")
+        self.cmake_compiler_configurations.set("CMAKE_CXX_FLAGS:STRING", "-O3 -DNDEBUG")
+        self.cmake_compiler_configurations.set("CMAKE_C_FLAGS:STRING", "-O3 -DNDEBUG")
 
     def post_build_fixup(self) -> None:
         manylinux_ver: str | None = self.package_env_config.get(
Original file line number	Diff line number	Diff line change
`@@ -88,8 +88,8 @@ def __init__(`
`88`	`88`	`self.cmake_compiler_configurations.update(`
`89`	`89`	`{`
`90`	`90`	`"CMAKE_BUILD_TYPE:STRING": f"{self._build_type}",`
`91`		`- "CMAKE_CXX_FLAGS:STRING": "\"-O3 -DNDEBUG\"",`
`92`		`- "CMAKE_C_FLAGS:STRING": "\"-O3 -DNDEBUG\"",`
	`91`	`+ "CMAKE_CXX_FLAGS:STRING": '"-O3 -DNDEBUG"',`
	`92`	`+ "CMAKE_C_FLAGS:STRING": '"-O3 -DNDEBUG"',`
`93`	`93`	`}`
`94`	`94`	`)`
`95`	`95`	`# Set cmake flags for the compiler if CC or CXX are specified`
Original file line number	Diff line number	Diff line change
`@@ -67,8 +67,8 @@ def prepare_build_env(self) -> None:`
`67`	`67`	`)`
`68`	`68`
`69`	`69`	`# Keep values consistent with prior quoting behavior`
`70`		`- self.cmake_compiler_configurations.set("CMAKE_CXX_FLAGS:STRING", "\"-O3 -DNDEBUG\"")`
`71`		`- self.cmake_compiler_configurations.set("CMAKE_C_FLAGS:STRING", "\"-O3 -DNDEBUG\"")`
	`70`	`+ self.cmake_compiler_configurations.set("CMAKE_CXX_FLAGS:STRING", "-O3 -DNDEBUG")`
	`71`	`+ self.cmake_compiler_configurations.set("CMAKE_C_FLAGS:STRING", "-O3 -DNDEBUG")`
`72`	`72`
`73`	`73`	`def post_build_fixup(self) -> None:`
`74`	`74`	`manylinux_ver: str \| None = self.package_env_config.get(`