diff --git a/docs/build.gradle b/docs/build.gradle
index 33fa7fc663..e9056a81a4 100644
--- a/docs/build.gradle
+++ b/docs/build.gradle
@@ -67,9 +67,6 @@ doxygen {
     cppIncludeRoots << '../ntcore/build/generated/main/native/include/'
 
     if (project.hasProperty('docWarningsAsErrors')) {
-        // C++20 shims
-        exclude 'wpi/ghc/filesystem.hpp'
-
         // Drake
         exclude 'drake/common/**'
 
diff --git a/wpiutil/CMakeLists.txt b/wpiutil/CMakeLists.txt
index 9b86e14a3b..2346843034 100644
--- a/wpiutil/CMakeLists.txt
+++ b/wpiutil/CMakeLists.txt
@@ -146,11 +146,6 @@ target_include_directories(wpiutil PUBLIC
                             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/main/native/thirdparty/memory/include>
                             $<INSTALL_INTERFACE:${include_dest}/wpiutil>)
 
-install(DIRECTORY src/main/native/thirdparty/ghc/include/ DESTINATION "${include_dest}/wpiutil")
-target_include_directories(wpiutil PUBLIC
-                            $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/main/native/thirdparty/ghc/include>
-                            $<INSTALL_INTERFACE:${include_dest}/wpiutil>)
-
 install(DIRECTORY src/main/native/thirdparty/json/include/ DESTINATION "${include_dest}/wpiutil")
 target_include_directories(wpiutil PUBLIC
                             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/main/native/thirdparty/json/include>
diff --git a/wpiutil/build.gradle b/wpiutil/build.gradle
index 501176a206..fa3be0ebb2 100644
--- a/wpiutil/build.gradle
+++ b/wpiutil/build.gradle
@@ -26,18 +26,13 @@ ext {
                     srcDirs 'src/main/native/thirdparty/fmtlib/include'
                 }
             }
-            ghcCpp(CppSourceSet) {
-                exportedHeaders {
-                    srcDirs 'src/main/native/thirdparty/ghc/include'
-                }
-            }
             jsonCpp(CppSourceSet) {
                 source {
                     srcDirs 'src/main/native/thirdparty/json/cpp'
                     include '*.cpp'
                 }
                 exportedHeaders {
-                    srcDirs 'src/main/native/include', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/fmtlib/include'
+                    srcDirs 'src/main/native/include', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/fmtlib/include'
                 }
             }
             llvmCpp(CppSourceSet) {
@@ -46,7 +41,7 @@ ext {
                     include '**/*.cpp'
                 }
                 exportedHeaders {
-                    srcDirs 'src/main/native/include', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/ghc/include'
+                    srcDirs 'src/main/native/include', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include'
                 }
             }
             mpackCpp(CppSourceSet) {
@@ -67,11 +62,6 @@ ext {
                     srcDirs 'src/main/native/thirdparty/sigslot/include'
                 }
             }
-            tcbSpanCpp(CppSourceSet) {
-                exportedHeaders {
-                    srcDirs 'src/main/native/thirdparty/tcb_span/include'
-                }
-            }
             memoryCpp(CppSourceSet) {
                 source {
                     srcDirs 'src/main/native/thirdparty/memory/src', 'src/main/native/thirdparty/memory/include/wpi/memory'
@@ -101,7 +91,7 @@ ext {
                         include '**/*.cpp'
                     }
                     exportedHeaders {
-                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/mpack/include'
+                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/mpack/include'
                         include '**/*.h'
                     }
                 }
@@ -115,7 +105,7 @@ ext {
                         include '**/*.cpp'
                     }
                     exportedHeaders {
-                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/mpack/include'
+                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/mpack/include'
                         include '**/*.h'
                     }
                 }
@@ -128,7 +118,7 @@ ext {
                         include '**/*.cpp'
                     }
                     exportedHeaders {
-                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/mpack/include'
+                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/mpack/include'
                         include '**/*.h'
                     }
                 }
@@ -141,7 +131,7 @@ ext {
                         include '**/*.cpp'
                     }
                     exportedHeaders {
-                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/mpack/include'
+                        srcDirs 'src/main/native/include', 'src/main/native/cpp', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/mpack/include'
                         include '**/*.h'
                     }
                 }
@@ -184,9 +174,6 @@ cppHeadersZip {
     from('src/main/native/thirdparty/fmtlib/include') {
         into '/'
     }
-    from('src/main/native/thirdparty/ghc/include') {
-        into '/'
-    }
     from('src/main/native/thirdparty/json/include') {
         into '/'
     }
@@ -199,9 +186,6 @@ cppHeadersZip {
     from('src/main/native/thirdparty/sigslot/include') {
         into '/'
     }
-    from('src/main/native/thirdparty/tcb_span/include') {
-        into '/'
-    }
     from('src/main/native/thirdparty/memory/include') {
         into '/'
     }
@@ -233,7 +217,7 @@ model {
         all {
             it.sources.each {
                 it.exportedHeaders {
-                    srcDirs 'src/main/native/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/tcb_span/include', 'src/main/native/thirdparty/ghc/include', 'src/main/native/thirdparty/memory/include', 'src/main/native/thirdparty/mpack/include'
+                    srcDirs 'src/main/native/include', 'src/main/native/thirdparty/fmtlib/include', 'src/main/native/thirdparty/llvm/include', 'src/main/native/thirdparty/sigslot/include', 'src/main/native/thirdparty/json/include', 'src/main/native/thirdparty/memory/include', 'src/main/native/thirdparty/mpack/include'
                 }
             }
         }
diff --git a/wpiutil/src/main/native/cpp/fs.cpp b/wpiutil/src/main/native/cpp/fs.cpp
index fad6a66d60..ed6829792c 100644
--- a/wpiutil/src/main/native/cpp/fs.cpp
+++ b/wpiutil/src/main/native/cpp/fs.cpp
@@ -43,26 +43,6 @@
 
 #endif  // _WIN32
 
-#if defined(__APPLE__)
-#include <Availability.h>
-#endif
-#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) \
-     || (defined(__cplusplus) && __cplusplus >= 201703L)) \
-    && defined(__has_include)
-#if __has_include(<filesystem>) \
-    && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) \
-        || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500) \
-    && (defined(__clang__) || !defined(__GNUC__) || __GNUC__ >= 10 \
-        || (__GNUC__ >= 9 && __GNUC_MINOR__ >= 1))
-#define GHC_USE_STD_FS
-#endif
-#endif
-#ifndef GHC_USE_STD_FS
-// #define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
-#define GHC_FILESYSTEM_IMPLEMENTATION
-#include "wpi/ghc/filesystem.hpp"
-#endif
-
 #include "wpi/Errno.h"
 #include "wpi/ErrorHandling.h"
 #include "wpi/WindowsError.h"