diff --git a/boulder/src/build/job/phase.rs b/boulder/src/build/job/phase.rs
index e8508544..535535aa 100644
--- a/boulder/src/build/job/phase.rs
+++ b/boulder/src/build/job/phase.rs
@@ -178,7 +178,6 @@ impl Phase {
             parser.add_definition("compiler_objcxxcpp", "clang++ -E");
             parser.add_definition("compiler_d", "ldc2");
             parser.add_definition("compiler_ar", "llvm-ar");
-            parser.add_definition("compiler_ld", "ld.lld");
             parser.add_definition("compiler_objcopy", "llvm-objcopy");
             parser.add_definition("compiler_nm", "llvm-nm");
             parser.add_definition("compiler_ranlib", "llvm-ranlib");
@@ -194,7 +193,6 @@ impl Phase {
             parser.add_definition("compiler_objcxxcpp", "g++ -E");
             parser.add_definition("compiler_d", "ldc2"); // FIXME: GDC
             parser.add_definition("compiler_ar", "gcc-ar");
-            parser.add_definition("compiler_ld", "ld.bfd");
             parser.add_definition("compiler_objcopy", "objcopy");
             parser.add_definition("compiler_nm", "gcc-nm");
             parser.add_definition("compiler_ranlib", "gcc-ranlib");
@@ -202,6 +200,14 @@ impl Phase {
             parser.add_definition("compiler_path", path);
         }
 
+        if recipe.parsed.mold {
+            parser.add_definition("compiler_ld", "ld.mold");
+        } else if matches!(recipe.parsed.options.toolchain, Toolchain::Llvm) {
+            parser.add_definition("compiler_ld", "ld.lld");
+        } else {
+            parser.add_definition("compiler_ld", "ld.bfd");
+        }
+
         /* Allow packagers to do stage specific actions in a pgo build */
         if matches!(pgo_stage, Some(pgo::Stage::One)) {
             parser.add_definition("pgo_stage", "ONE");
@@ -346,12 +352,12 @@ fn add_tuning(
     let toolchain = recipe.parsed.options.toolchain;
     let flags = tuning.build()?;
 
-    let cflags = fmt_flags(
+    let mut cflags = fmt_flags(
         flags
             .iter()
             .filter_map(|flag| flag.get(tuning::CompilerFlag::C, toolchain)),
     );
-    let cxxflags = fmt_flags(
+    let mut cxxflags = fmt_flags(
         flags
             .iter()
             .filter_map(|flag| flag.get(tuning::CompilerFlag::Cxx, toolchain)),
@@ -366,12 +372,18 @@ fn add_tuning(
             .iter()
             .filter_map(|flag| flag.get(tuning::CompilerFlag::D, toolchain)),
     );
-    let rustflags = fmt_flags(
+    let mut rustflags = fmt_flags(
         flags
             .iter()
             .filter_map(|flag| flag.get(tuning::CompilerFlag::Rust, toolchain)),
     );
 
+    if recipe.parsed.mold {
+        cflags.push_str(" -fuse-ld=mold");
+        cxxflags.push_str(" -fuse-ld=mold");
+        rustflags.push_str(" -Clink-arg=-fuse-ld=mold");
+    }
+
     parser.add_definition("cflags", cflags);
     parser.add_definition("cxxflags", cxxflags);
     parser.add_definition("ldflags", ldflags);
diff --git a/boulder/src/build/root.rs b/boulder/src/build/root.rs
index 2b43c964..956a363a 100644
--- a/boulder/src/build/root.rs
+++ b/boulder/src/build/root.rs
@@ -103,6 +103,10 @@ fn packages(builder: &Builder) -> Vec<&str> {
         }
     }
 
+    if builder.recipe.parsed.mold {
+        packages.extend(MOLD_PACKAGES);
+    }
+
     if builder.ccache {
         packages.extend(CCACHE_PACKAGES);
     }
@@ -203,6 +207,8 @@ const GNU32_PACKAGES: &[&str] = &["gcc-32bit", "g++-32bit"];
 const LLVM_PACKAGES: &[&str] = &["clang"];
 const LLVM32_PACKAGES: &[&str] = &["clang-32bit", "libcxx-32bit-devel"];
 
+const MOLD_PACKAGES: &[&str] = &["binary(mold)"];
+
 const CCACHE_PACKAGES: &[&str] = &["binary(ccache)", "binary(sccache)"];
 
 #[derive(Debug, Error)]
diff --git a/crates/stone_recipe/src/lib.rs b/crates/stone_recipe/src/lib.rs
index b0565b60..d3df2b3d 100644
--- a/crates/stone_recipe/src/lib.rs
+++ b/crates/stone_recipe/src/lib.rs
@@ -48,6 +48,8 @@ pub struct Recipe {
     pub tuning: Vec<KeyValue<Tuning>>,
     #[serde(default, deserialize_with = "stringy_bool")]
     pub emul32: bool,
+    #[serde(default, deserialize_with = "stringy_bool")]
+    pub mold: bool,
 }
 
 #[derive(Debug, Clone)]