diff --git a/Project.toml b/Project.toml
index 1208605..4e284c4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -10,9 +10,11 @@ projects = ["docs", "test"]
 CodeTracking = "da1fd8a2-8d9e-5ec2-8556-3022fb5608a2"
 Compiler = "807dbc54-b67e-4c79-8afb-eafe4df6f2e1"
 JuliaInterpreter = "aa1ae85d-cabe-5617-a682-6adf51b2e16a"
+PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 
 [compat]
 CodeTracking = "3"
 Compiler = "0.1"
 JuliaInterpreter = "0.12"
+PrecompileTools = "1.2.1"
 julia = "1.10"
diff --git a/src/LoweredCodeUtils.jl b/src/LoweredCodeUtils.jl
index ee907e1..5213eff 100644
--- a/src/LoweredCodeUtils.jl
+++ b/src/LoweredCodeUtils.jl
@@ -5,7 +5,9 @@ module LoweredCodeUtils
 # a Julia base or stdlib package are located in this file here.
 # Nothing else should appear in this file here, apart from
 # the `include("packagedef.jl")` statement, which loads what
-# we would normally consider the bulk of the package code.
+# we would normally consider the bulk of the package code,
+# and the precompile workload in precompile.jl, which uses
+# PrecompileTools.
 # This somewhat unusual structure is in place to support
 # the VS Code extension integration.
 
@@ -19,7 +21,9 @@ using JuliaInterpreter:
     is_quotenode_egal, is_return, linetable, lookup, lookup_return, moduleof, next_until!,
     nstatements, pc_expr, step_expr!, whichtt
 using Compiler: Compiler as CC
+using PrecompileTools: PrecompileTools
 
 include("packagedef.jl")
+include("precompile.jl")
 
 end # module
diff --git a/src/packagedef.jl b/src/packagedef.jl
index dc157e7..55a7e82 100644
--- a/src/packagedef.jl
+++ b/src/packagedef.jl
@@ -28,36 +28,3 @@ export CodeEdges, SelectiveEvalController, SelectiveInterpreter,
 include("utils.jl")
 include("signatures.jl")
 include("codeedges.jl")
-
-# precompilation
-
-if ccall(:jl_generating_output, Cint, ()) == 1
-    ex = :(f(x; color::Symbol=:green) = 2x)
-    lwr = Meta.lower(@__MODULE__, ex)
-    frame = Frame(@__MODULE__, lwr.args[1])
-    rename_framemethods!(frame)
-    ex = quote
-        s = 0
-        k = 5
-        for i = 1:3
-            global s, k
-            s += rand(1:5)
-            k += i
-        end
-    end
-    lwr = Meta.lower(@__MODULE__, ex)
-    src = lwr.args[1]
-    edges = CodeEdges(@__MODULE__, src)
-    isrequired = lines_required(GlobalRef(@__MODULE__, :s), src, edges)
-    lines_required(GlobalRef(@__MODULE__, :s), src, edges; norequire=())
-    lines_required(GlobalRef(@__MODULE__, :s), src, edges; norequire=exclude_named_typedefs(src))
-    for isreq in (isrequired, convert(Vector{Bool}, isrequired))
-        lines_required!(isreq, src, edges; norequire=())
-        lines_required!(isreq, src, edges; norequire=exclude_named_typedefs(src))
-    end
-    frame = Frame(@__MODULE__, src)
-    # selective_eval_fromstart!(frame, isrequired, true)
-    precompile(selective_eval_fromstart!, (typeof(frame), typeof(isrequired), Bool))  # can't @eval during precompilation
-    print_with_code(Base.inferencebarrier(devnull)::IO, src, edges)
-    print_with_code(Base.inferencebarrier(devnull)::IO, src, isrequired)
-end
diff --git a/src/precompile.jl b/src/precompile.jl
new file mode 100644
index 0000000..e08f152
--- /dev/null
+++ b/src/precompile.jl
@@ -0,0 +1,30 @@
+PrecompileTools.@setup_workload let
+    kwsrc = Meta.lower(@__MODULE__, :(f(x; color::Symbol=:green) = 2x)).args[1]
+    ex = quote
+        s = 0
+        k = 5
+        for i = 1:3
+            global s, k
+            s += rand(1:5)
+            k += i
+        end
+    end
+    src = Meta.lower(@__MODULE__, ex).args[1]
+    PrecompileTools.@compile_workload let
+        frame = Frame(@__MODULE__, kwsrc)
+        rename_framemethods!(frame)
+        edges = CodeEdges(@__MODULE__, src)
+        isrequired = lines_required(GlobalRef(@__MODULE__, :s), src, edges)
+        lines_required(GlobalRef(@__MODULE__, :s), src, edges; norequire=())
+        lines_required(GlobalRef(@__MODULE__, :s), src, edges; norequire=exclude_named_typedefs(src))
+        for isreq in (isrequired, convert(Vector{Bool}, isrequired))
+            lines_required!(isreq, src, edges; norequire=())
+            lines_required!(isreq, src, edges; norequire=exclude_named_typedefs(src))
+        end
+        frame = Frame(@__MODULE__, src)
+        # selective_eval_fromstart!(frame, isrequired, true)
+        precompile(selective_eval_fromstart!, (typeof(frame), typeof(isrequired), Bool))  # can't @eval during precompilation
+        print_with_code(Base.inferencebarrier(devnull)::IO, src, edges)
+        print_with_code(Base.inferencebarrier(devnull)::IO, src, isrequired)
+    end
+end