diff --git a/ecp5/arch.h b/ecp5/arch.h
index bbc7c561..930c488e 100644
--- a/ecp5/arch.h
+++ b/ecp5/arch.h
@@ -730,6 +730,7 @@ struct Arch : BaseCtx
 
     // -------------------------------------------------
 
+    bool pack();
     bool place();
     bool route();
 
diff --git a/ecp5/main.cc b/ecp5/main.cc
index 734ae560..4cb2f10d 100644
--- a/ecp5/main.cc
+++ b/ecp5/main.cc
@@ -43,7 +43,6 @@
 #include "bitstream.h"
 #include "design_utils.h"
 #include "jsonparse.h"
-#include "pack.h"
 #include "timing.h"
 
 USING_NEXTPNR_NAMESPACE
@@ -147,7 +146,7 @@ int main(int argc, char *argv[])
             if (!parse_json_file(f, filename, ctx.get()))
                 log_error("Loading design failed.\n");
 
-            if (!pack_design(ctx.get()) && !ctx->force)
+            if (!ctx->pack() && !ctx->force)
                 log_error("Packing design failed.\n");
             if (vm.count("freq"))
                 ctx->target_freq = vm["freq"].as<double>() * 1e6;
diff --git a/ecp5/pack.cc b/ecp5/pack.cc
index 7f54c231..e3ddc07d 100644
--- a/ecp5/pack.cc
+++ b/ecp5/pack.cc
@@ -17,7 +17,6 @@
  *
  */
 
-#include "pack.h"
 #include <algorithm>
 #include <iterator>
 #include <unordered_set>
@@ -84,8 +83,9 @@ void pack_io(Context *ctx)
 }
 
 // Main pack function
-bool pack_design(Context *ctx)
+bool Arch::pack()
 {
+    Context *ctx = getCtx();
     try {
         log_break();
         pack_io(ctx);
diff --git a/ecp5/pack.h b/ecp5/pack.h
deleted file mode 100644
index cc051a41..00000000
--- a/ecp5/pack.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- *  nextpnr -- Next Generation Place and Route
- *
- *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
- *
- *  Permission to use, copy, modify, and/or distribute this software for any
- *  purpose with or without fee is hereby granted, provided that the above
- *  copyright notice and this permission notice appear in all copies.
- *
- *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#ifndef PACK_H
-#define PACK_H
-
-#include "nextpnr.h"
-
-NEXTPNR_NAMESPACE_BEGIN
-
-bool pack_design(Context *ctx);
-
-NEXTPNR_NAMESPACE_END
-
-#endif // ROUTE_H
diff --git a/generic/arch.h b/generic/arch.h
index f6243404..5d7ac540 100644
--- a/generic/arch.h
+++ b/generic/arch.h
@@ -183,6 +183,7 @@ struct Arch : BaseCtx
     float getDelayNS(delay_t v) const { return v; }
     uint32_t getDelayChecksum(delay_t v) const { return 0; }
 
+    bool pack() { return true; }
     bool place();
     bool route();
 
diff --git a/gui/ice40/mainwindow.cc b/gui/ice40/mainwindow.cc
index b7f08104..bea5fce7 100644
--- a/gui/ice40/mainwindow.cc
+++ b/gui/ice40/mainwindow.cc
@@ -27,7 +27,6 @@
 #include "design_utils.h"
 #include "jsonparse.h"
 #include "log.h"
-#include "pack.h"
 #include "pcf.h"
 
 static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }
diff --git a/gui/ice40/worker.cc b/gui/ice40/worker.cc
index 16f5fb89..09093ec8 100644
--- a/gui/ice40/worker.cc
+++ b/gui/ice40/worker.cc
@@ -23,7 +23,6 @@
 #include "design_utils.h"
 #include "jsonparse.h"
 #include "log.h"
-#include "pack.h"
 #include "pcf.h"
 #include "timing.h"
 
@@ -97,7 +96,7 @@ void Worker::pack()
 {
     Q_EMIT taskStarted();
     try {
-        bool res = pack_design(ctx);
+        bool res = ctx->pack();
         print_utilisation(ctx);
         Q_EMIT pack_finished(res);
     } catch (WorkerInterruptionRequested) {
diff --git a/ice40/arch.h b/ice40/arch.h
index b6c64de4..34797442 100644
--- a/ice40/arch.h
+++ b/ice40/arch.h
@@ -672,6 +672,7 @@ struct Arch : BaseCtx
 
     // -------------------------------------------------
 
+    bool pack();
     bool place();
     bool route();
 
diff --git a/ice40/arch_pybindings.cc b/ice40/arch_pybindings.cc
index ac8c189a..fd5109b4 100644
--- a/ice40/arch_pybindings.cc
+++ b/ice40/arch_pybindings.cc
@@ -58,7 +58,10 @@ void arch_wrap_python()
 
     auto arch_cls = class_<Arch, Arch *, bases<BaseCtx>, boost::noncopyable>("Arch", init<ArchArgs>());
     auto ctx_cls = class_<Context, Context *, bases<Arch>, boost::noncopyable>("Context", no_init)
-                           .def("checksum", &Context::checksum);
+                           .def("checksum", &Context::checksum)
+                           .def("pack", &Context::pack)
+                           .def("place", &Context::place)
+                           .def("route", &Context::route);
 
     fn_wrapper_1a<Context, decltype(&Context::getBelType), &Context::getBelType, conv_to_str<BelType>,
                   conv_from_str<BelId>>::def_wrap(ctx_cls, "getBelType");
diff --git a/ice40/main.cc b/ice40/main.cc
index 53cd7164..e77bdd34 100644
--- a/ice40/main.cc
+++ b/ice40/main.cc
@@ -39,7 +39,6 @@
 #include "jsonparse.h"
 #include "log.h"
 #include "nextpnr.h"
-#include "pack.h"
 #include "pcf.h"
 #include "place_legaliser.h"
 #include "timing.h"
@@ -382,7 +381,7 @@ int main(int argc, char *argv[])
                     log_error("Loading PCF failed.\n");
             }
 
-            if (!pack_design(ctx.get()) && !ctx->force)
+            if (!ctx->pack() && !ctx->force)
                 log_error("Packing design failed.\n");
             assign_budget(ctx.get());
             ctx->check();
diff --git a/ice40/pack.cc b/ice40/pack.cc
index d1be4a29..76a52be0 100644
--- a/ice40/pack.cc
+++ b/ice40/pack.cc
@@ -18,7 +18,6 @@
  *
  */
 
-#include "pack.h"
 #include <algorithm>
 #include <iterator>
 #include <unordered_set>
@@ -577,8 +576,9 @@ static void pack_special(Context *ctx)
 }
 
 // Main pack function
-bool pack_design(Context *ctx)
+bool Arch::pack()
 {
+    Context *ctx = getCtx();
     try {
         log_break();
         pack_constants(ctx);
diff --git a/ice40/pack.h b/ice40/pack.h
deleted file mode 100644
index cdebdd79..00000000
--- a/ice40/pack.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- *  nextpnr -- Next Generation Place and Route
- *
- *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
- *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
- *
- *  Permission to use, copy, modify, and/or distribute this software for any
- *  purpose with or without fee is hereby granted, provided that the above
- *  copyright notice and this permission notice appear in all copies.
- *
- *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#ifndef PACK_H
-#define PACK_H
-
-#include "nextpnr.h"
-
-NEXTPNR_NAMESPACE_BEGIN
-
-bool pack_design(Context *ctx);
-
-NEXTPNR_NAMESPACE_END
-
-#endif // ROUTE_H