diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0af3edf7..68fee49a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,18 +23,16 @@ jobs:
           - '1.10'
           - '1'
           - 'pre'
+          - 'nightly'
         os:
           - ubuntu-latest
           - macOS-latest
           - windows-latest
-        arch:
-          - x64
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
-          arch: ${{ matrix.arch }}
           show-versioninfo: ${{ matrix.version == 'nightly' }}
       - uses: actions/cache@v4
         env:
diff --git a/src/parcel_snoop_inference.jl b/src/parcel_snoop_inference.jl
index 6862ef4d..e6360acf 100644
--- a/src/parcel_snoop_inference.jl
+++ b/src/parcel_snoop_inference.jl
@@ -31,7 +31,12 @@ isROOT(node::InferenceTimingNode) = isROOT(node.mi_timing)
 getroot(node::InferenceTimingNode) = isdefined(node.parent, :parent) ? getroot(node.parent) : node
 
 # Record instruction pointers we've already looked up (performance optimization)
-const lookups = Dict{Union{UInt, Core.Compiler.InterpreterIP}, Vector{StackTraces.StackFrame}}()
+const lookups = if isdefined(Core.Compiler, :InterpreterIP)
+    Dict{Union{UInt, Core.Compiler.InterpreterIP}, Vector{StackTraces.StackFrame}}()
+else
+    # Julia 1.12+
+    Dict{Union{UInt, Base.InterpreterIP}, Vector{StackTraces.StackFrame}}()
+end
 lookups_key(ip) = ip
 lookups_key(ip::Ptr{Nothing}) = UInt(ip)