diff --git a/libbpf-rs-downgrade-libbpf-sys-040.patch b/libbpf-rs-downgrade-libbpf-sys-040.patch
deleted file mode 100644
index 0f00568..0000000
--- a/libbpf-rs-downgrade-libbpf-sys-040.patch
+++ /dev/null
@@ -1,51 +0,0 @@
-diff -ruN libbpf-rs-0.16.0/Cargo.toml libbpf-rs-0.16.0-downgrade-to-0.4.0/Cargo.toml
---- libbpf-rs-0.16.0/Cargo.toml	1969-12-31 16:00:01.000000000 -0800
-+++ libbpf-rs-0.16.0-downgrade-to-0.4.0/Cargo.toml	2022-02-15 16:15:59.255663607 -0800
-@@ -27,7 +27,7 @@
- version = "1.4"
- 
- [dependencies.libbpf-sys]
--version = "0.6.0-1"
-+version = "0.4.0-2"
- 
- [dependencies.nix]
- version = "0.22"
-diff -ruN libbpf-rs-0.16.0/src/object.rs libbpf-rs-0.16.0-downgrade-to-0.4.0/src/object.rs
---- libbpf-rs-0.16.0/src/object.rs	1973-11-29 13:33:09.000000000 -0800
-+++ libbpf-rs-0.16.0-downgrade-to-0.4.0/src/object.rs	2022-02-15 16:15:43.089602484 -0800
-@@ -53,9 +53,6 @@
-             pin_root_path: ptr::null(),
-             attach_prog_fd: 0,
-             kconfig: ptr::null(),
--            btf_custom_path: ptr::null(),
--            __bindgen_padding_0: <[u8; 6]>::default(),
--            __bindgen_padding_1: <[u8; 4]>::default(),
-         }
-     }
- 
-diff -ruN libbpf-rs-0.16.0/src/perf_buffer.rs libbpf-rs-0.16.0-downgrade-to-0.4.0/src/perf_buffer.rs
---- libbpf-rs-0.16.0/src/perf_buffer.rs	1973-11-29 13:33:09.000000000 -0800
-+++ libbpf-rs-0.16.0-downgrade-to-0.4.0/src/perf_buffer.rs	2022-02-15 16:20:53.001774261 -0800
-@@ -106,15 +106,14 @@
-             lost_cb: self.lost_cb,
-         }));
- 
-+        let opts = libbpf_sys::perf_buffer_opts {
-+            sample_cb: c_sample_cb,
-+            lost_cb: c_lost_cb,
-+            ctx: callback_struct_ptr as *mut _,
-+        };
-+
-         let ptr = unsafe {
--            libbpf_sys::perf_buffer__new(
--                self.map.fd(),
--                self.pages as libbpf_sys::size_t,
--                c_sample_cb,
--                c_lost_cb,
--                callback_struct_ptr as *mut _,
--                std::ptr::null(),
--            )
-+            libbpf_sys::perf_buffer__new(self.map.fd(), self.pages as libbpf_sys::size_t, &opts)
-         };
-         let err = unsafe { libbpf_sys::libbpf_get_error(ptr as *const _) };
-         if err != 0 {
diff --git a/libbpf-rs-downgrade-libbpf-sys-050.patch b/libbpf-rs-downgrade-libbpf-sys-050.patch
deleted file mode 100644
index cf26193..0000000
--- a/libbpf-rs-downgrade-libbpf-sys-050.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-diff -ruN libbpf-rs-0.16.0/Cargo.toml libbpf-rs-0.16.0-downgrade-to-0.5.0/Cargo.toml
---- libbpf-rs-0.16.0/Cargo.toml	1969-12-31 16:00:01.000000000 -0800
-+++ libbpf-rs-0.16.0-downgrade-to-0.5.0/Cargo.toml	2022-02-15 15:44:14.990476446 -0800
-@@ -27,7 +27,7 @@
- version = "1.4"
- 
- [dependencies.libbpf-sys]
--version = "0.6.0-1"
-+version = "0.5.0-2"
- 
- [dependencies.nix]
- version = "0.22"
-diff -ruN libbpf-rs-0.16.0/src/perf_buffer.rs libbpf-rs-0.16.0-downgrade-to-0.5.0/src/perf_buffer.rs
---- libbpf-rs-0.16.0/src/perf_buffer.rs	1973-11-29 13:33:09.000000000 -0800
-+++ libbpf-rs-0.16.0-downgrade-to-0.5.0/src/perf_buffer.rs	2022-02-15 15:43:29.766306029 -0800
-@@ -106,15 +106,14 @@
-             lost_cb: self.lost_cb,
-         }));
- 
-+        let opts = libbpf_sys::perf_buffer_opts {
-+            sample_cb: c_sample_cb,
-+            lost_cb: c_lost_cb,
-+            ctx: callback_struct_ptr as *mut _,
-+        };
-+
-         let ptr = unsafe {
--            libbpf_sys::perf_buffer__new(
--                self.map.fd(),
--                self.pages as libbpf_sys::size_t,
--                c_sample_cb,
--                c_lost_cb,
--                callback_struct_ptr as *mut _,
--                std::ptr::null(),
--            )
-+            libbpf_sys::perf_buffer__new(self.map.fd(), self.pages as libbpf_sys::size_t, &opts)
-         };
-         let err = unsafe { libbpf_sys::libbpf_get_error(ptr as *const _) };
-         if err != 0 {