diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 121ceae..06af5c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,32 +26,26 @@ jobs:
       matrix:
         version:
           - '1.10'
-          - '1.11'
-          - '1.12'
+          - '1'
           - 'nightly'
         os:
           - ubuntu-latest
           - windows-latest
-          - macos-15-intel # Intel
           - macos-latest # Apple Silicon
         julia-wordsize:
           # The value here only affects the version of Julia binary that we download.
           # It does not affect the architecture of the GitHub Runner (virtual machine) that
           # we run on.
-          - '32' # 32-bit Julia. Only available on x86_64. Not available on aarch64.
           - '64' # 64-bit Julia.
         exclude:
           # Killing workers doesn't work on Windows in Julia 1.10:
           # (It does work on 1.11+)
           - os: windows-latest
             version: '1.10'
-          # We don't have 32-bit builds of Julia for Intel macOS:
-          - os: macos-15-intel # Intel
-            julia-wordsize: '32'
-          #
-          # We don't have 32-bit builds of Julia for Apple Silicon macOS:
-          - os: macos-latest # Apple Silicon
+        include:
+          - os: ubuntu-latest
             julia-wordsize: '32'
+            version: '1'
 
     steps:
       - uses: actions/checkout@v6
diff --git a/src/precompile.jl b/src/precompile.jl
index 6026c6a..e3d592b 100644
--- a/src/precompile.jl
+++ b/src/precompile.jl
@@ -3,6 +3,13 @@ precompile(Tuple{typeof(DistributedNext.procs)})
 precompile(Tuple{typeof(DistributedNext.finalize_ref), DistributedNext.Future})
 precompile(Tuple{typeof(DistributedNext.setup_launched_worker), DistributedNext.LocalManager, DistributedNext.WorkerConfig, Vector{Int}})
 precompile(Tuple{typeof(DistributedNext.process_tcp_streams), Sockets.TCPSocket, Sockets.TCPSocket, Bool})
+precompile(Tuple{typeof(Serialization.serialize), DistributedNext.ClusterSerializer{Sockets.TCPSocket}, Array{Any, 1}})
+precompile(Tuple{typeof(DistributedNext.parse_connection_info), String})
+precompile(Tuple{typeof(DistributedNext._run_callbacks_concurrently), String, Base.Dict{Any, Union{Function, Type}}, Int64, Array{Tuple{DistributedNext.LocalManager, Base.Dict{Symbol, Any}}, 1}})
+precompile(Tuple{typeof(DistributedNext._run_callbacks_concurrently), String, Base.Dict{Any, Union{Function, Type}}, Int64, Array{Int64, 1}})
+precompile(Tuple{typeof(DistributedNext.read_worker_host_port), Base.PipeEndpoint})
+precompile(Tuple{typeof(Base.put!), Base.Channel{Any}, Int64})
+precompile(Tuple{typeof(Base.put!), Base.Channel{Any}, WeakRef})
 
 precompile(Tuple{typeof(DistributedNext.handle_msg), DistributedNext.IdentifySocketMsg, DistributedNext.MsgHeader, Sockets.TCPSocket, Sockets.TCPSocket, VersionNumber})
 precompile(Tuple{typeof(DistributedNext.handle_msg), DistributedNext.CallWaitMsg, DistributedNext.MsgHeader, Sockets.TCPSocket, Sockets.TCPSocket, VersionNumber})
@@ -14,6 +21,12 @@ precompile(Tuple{typeof(DistributedNext.handle_msg), DistributedNext.RemoteDoMsg
 precompile(Tuple{typeof(DistributedNext.handle_msg), DistributedNext.JoinPGRPMsg, DistributedNext.MsgHeader, Sockets.TCPSocket, Sockets.TCPSocket, VersionNumber})
 precompile(Tuple{typeof(DistributedNext.handle_msg), DistributedNext.JoinCompleteMsg, DistributedNext.MsgHeader, Sockets.TCPSocket, Sockets.TCPSocket, VersionNumber})
 
+# These lines were obtained from `addprocs(1; exeflags=`--trace-compile=compilation.txt --trace-compile-timing`)`
+precompile(Tuple{typeof(DistributedNext.start_worker)})
+precompile(Tuple{typeof(DistributedNext.start_worker), Base.PipeEndpoint, String})
+precompile(Tuple{typeof(DistributedNext.set_valid_processes), Array{Int64, 1}})
+precompile(Tuple{typeof(DistributedNext.terminate_all_workers)})
+
 # This is disabled because it doesn't give much benefit
 # and the code in Distributed is poorly typed causing many invalidations
 # TODO: Maybe reenable now that Distributed is not in sysimage.