diff --git a/include/vcpkg/build.h b/include/vcpkg/build.h
index feefb1dacc..2aa9883df4 100644
--- a/include/vcpkg/build.h
+++ b/include/vcpkg/build.h
@@ -18,8 +18,8 @@
 #include <vcpkg/vcpkgpaths.h>
 
 #include <array>
-#include <map>
-#include <set>
+#include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 namespace vcpkg
@@ -259,6 +259,8 @@ namespace vcpkg
         Optional<std::string> public_abi_override;
         std::vector<std::string> passthrough_env_vars;
         std::vector<std::string> passthrough_env_vars_tracked;
+        std::unordered_set<std::string> ignored_abi_keys;
+        std::unordered_map<std::string, std::string> additional_abi_entries;
 
         Path toolchain_file() const;
         bool using_vcvars() const;
diff --git a/src/vcpkg/build.cpp b/src/vcpkg/build.cpp
index 96c0568959..a99294b660 100644
--- a/src/vcpkg/build.cpp
+++ b/src/vcpkg/build.cpp
@@ -1162,6 +1162,14 @@ namespace vcpkg
 
         abi_tag_entries.emplace_back("features", Strings::join(";", sorted_feature_list));
 
+        abi_tag_entries = Util::filter(abi_tag_entries, [&](const AbiEntry& p) {
+            return !Util::Sets::contains(abi_info.pre_build_info->ignored_abi_keys, p.key);
+        });
+        for (auto&& entry : abi_info.pre_build_info->additional_abi_entries)
+        {
+            abi_tag_entries.emplace_back(entry.first, entry.second);
+        }
+
         Util::sort(abi_tag_entries);
 
         const std::string full_abi_info =
@@ -1639,6 +1647,8 @@ namespace vcpkg
             PUBLIC_ABI_OVERRIDE,
             LOAD_VCVARS_ENV,
             DISABLE_COMPILER_TRACKING,
+            IGNORED_ABI_KEYS,
+            ADDITIONAL_ABI_ENTRIES,
         };
 
         static const std::vector<std::pair<std::string, VcpkgTripletVar>> VCPKG_OPTIONS = {
@@ -1656,6 +1666,8 @@ namespace vcpkg
             // Note: this value must come after VCPKG_CHAINLOAD_TOOLCHAIN_FILE because its default depends upon it.
             {"VCPKG_LOAD_VCVARS_ENV", VcpkgTripletVar::LOAD_VCVARS_ENV},
             {"VCPKG_DISABLE_COMPILER_TRACKING", VcpkgTripletVar::DISABLE_COMPILER_TRACKING},
+            {"VCPKG_IGNORED_ABI_KEYS", VcpkgTripletVar::IGNORED_ABI_KEYS},
+            {"VCPKG_ADDITIONAL_ABI_ENTRIES", VcpkgTripletVar::ADDITIONAL_ABI_ENTRIES},
         };
 
         std::string empty;
@@ -1732,6 +1744,21 @@ namespace vcpkg
                             from_cmake_bool(variable_value, kv.first).value_or_exit(VCPKG_LINE_INFO);
                     }
                     break;
+                case VcpkgTripletVar::IGNORED_ABI_KEYS:
+                    for (auto&& abi_key : Strings::split(variable_value, ';'))
+                        ignored_abi_keys.emplace(std::move(abi_key));
+                    break;
+                case VcpkgTripletVar::ADDITIONAL_ABI_ENTRIES:
+                    for (auto&& abi_entry_str : Strings::split(variable_value, ';'))
+                    {
+                        auto const sep_pos = abi_entry_str.find_first_of(' ');
+                        if (sep_pos != std::string::npos)
+                        {
+                            additional_abi_entries.emplace(abi_entry_str.substr(0, sep_pos),
+                                                           abi_entry_str.substr(sep_pos + 1));
+                        }
+                    }
+                    break;
             }
         }
     }
diff --git a/src/vcpkg/cmakevars.cpp b/src/vcpkg/cmakevars.cpp
index afc55c6c89..1ab8bb229d 100644
--- a/src/vcpkg/cmakevars.cpp
+++ b/src/vcpkg/cmakevars.cpp
@@ -165,6 +165,8 @@ VCPKG_ENV_PASSTHROUGH=${VCPKG_ENV_PASSTHROUGH}
 VCPKG_ENV_PASSTHROUGH_UNTRACKED=${VCPKG_ENV_PASSTHROUGH_UNTRACKED}
 VCPKG_LOAD_VCVARS_ENV=${VCPKG_LOAD_VCVARS_ENV}
 VCPKG_DISABLE_COMPILER_TRACKING=${VCPKG_DISABLE_COMPILER_TRACKING}
+VCPKG_IGNORED_ABI_KEYS=${VCPKG_IGNORED_ABI_KEYS}
+VCPKG_ADDITIONAL_ABI_ENTRIES=${VCPKG_ADDITIONAL_ABI_ENTRIES}
 e1e74b5c-18cb-4474-a6bd-5c1c8bc81f3f
 8c504940-be29-4cba-9f8f-6cd83e9d87b7")
 endfunction()