diff --git a/build-fail-blacklist b/build-fail-blacklist
index 268238bc3eda0..c3150d98cdc4a 100644
--- a/build-fail-blacklist
+++ b/build-fail-blacklist
@@ -51,9 +51,6 @@ recipes/bcftools/1.3.1
 # fitBeta2.cpp:158:93: error: no matching function for call to 'arma::eGlue<arma::Glue<arma::Glue<arma::Op<arma::Mat<double>, arma::op_htrans>, arma::Mat<double>, arma::glue_times>, arma::Mat<double>, arma::glue_times>, arma::Mat<double>, arma::eglue_plus>::i(bool) const'
 recipes/xtail
 
-# unknown c++ error
-recipes/bedops
-
 # needs patching for compilers
 recipes/logol
 
diff --git a/recipes/bedops/meta.yaml b/recipes/bedops/meta.yaml
index 92e6e80658b0f..dc207316e2625 100644
--- a/recipes/bedops/meta.yaml
+++ b/recipes/bedops/meta.yaml
@@ -1,15 +1,17 @@
+{% set version = "2.4.40" %}
+
 package:
   name: bedops
-  version: 2.4.39
+  version: {{ version }}
 
 build:
-  number: 1
-  # Unknown build error with clang-11
-  skip: True  # [OSX]
+  number: 0
 
 source:
-  url: https://github.com/bedops/bedops/archive/v2.4.39.tar.gz
-  sha256: f8bae10c6e1ccfb873be13446c67fc3a54658515fb5071663883f788fc0e4912
+  url: https://github.com/bedops/bedops/archive/v{{ version }}.tar.gz
+  sha256: 8c01db76669dc58c595e2e1b9bdb6d462f3363fc569b15c460a63a63b8b6bf30
+  patches:
+    - omit-bad-mutable.patch
 
 requirements:
   build:
diff --git a/recipes/bedops/omit-bad-mutable.patch b/recipes/bedops/omit-bad-mutable.patch
new file mode 100644
index 0000000000000..177f9e7391ff3
--- /dev/null
+++ b/recipes/bedops/omit-bad-mutable.patch
@@ -0,0 +1,76 @@
+GCC and previous Clang successfully compile const member functions that
+modify non-mutable fields when they are members of a templated class
+that is never instantiated. Recent Clang (v11 onwards) produces errors
+in this case.
+
+The problematic functions are never used, so we work around this by
+omitting them.
+
+diff --git a/applications/bed/bedextract/src/ExtractRows.cpp b/applications/bed/bedextract/src/ExtractRows.cpp
+index c5f81b6a..c15644ca 100644
+--- a/applications/bed/bedextract/src/ExtractRows.cpp
++++ b/applications/bed/bedextract/src/ExtractRows.cpp
+@@ -77,7 +77,6 @@ namespace {
+     }
+ 
+     bool Empty() const { return empty_; }
+-    void Clear() const { empty_ = true; }
+ 
+   private:
+     bool empty_;
+diff --git a/interfaces/general-headers/utility/BitMonitor.hpp b/interfaces/general-headers/utility/BitMonitor.hpp
+index f9fefdda..0eb91810 100644
+--- a/interfaces/general-headers/utility/BitMonitor.hpp
++++ b/interfaces/general-headers/utility/BitMonitor.hpp
+@@ -78,6 +78,7 @@ namespace Ext {
+       _open = 0;
+     }
+ 
++#if 0
+     inline std::size_t next_set(std::size_t start) const {
+       start += 1;
+       std::size_t bin = start/BASE;
+@@ -110,6 +111,7 @@ namespace Ext {
+         _open = 0;
+       return next_set(0);
+     }
++#endif
+ 
+     inline std::size_t next_unset(std::size_t start) {
+       start += 1;
+diff --git a/interfaces/general-headers/utility/CharPooledMemory.hpp b/interfaces/general-headers/utility/CharPooledMemory.hpp
+index 267bb604..7d6793a2 100644
+--- a/interfaces/general-headers/utility/CharPooledMemory.hpp
++++ b/interfaces/general-headers/utility/CharPooledMemory.hpp
+@@ -203,6 +203,7 @@ namespace Ext {
+         }
+ 
+     private:
++#if 0
+       char*
+       find_open(char const* c)
+         {
+@@ -254,6 +255,7 @@ namespace Ext {
+           } // while
+           return nullptr;
+         }
++#endif
+ 
+       friend struct PooledCharMemory2<nelements>;
+ 
+@@ -466,6 +468,7 @@ namespace Ext {
+           return clean(c, sz);
+         }
+ 
++#if 0
+       char*
+       clean(char const* c, std::size_t need)
+         {
+@@ -492,6 +495,7 @@ namespace Ext {
+           _dirty.clear();
+           return nullptr;
+         }
++#endif
+ 
+       friend struct PooledCharMemory<nelements>;
+