diff --git a/.circleci/config.yml b/.circleci/config.yml
index e2069e348..a3a052c28 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -109,9 +109,9 @@ jobs:
           # "make lint" fails before go 1.21 because internal/tools/go.mod specifies packages that require go 1.21
           fmt-check: false
     resource_class: large
-  test-llvm19-go123:
+  test-llvm19-go124:
     docker:
-      - image: golang:1.23-bullseye
+      - image: golang:1.24-bullseye
     steps:
       - test-linux:
           llvm: "19"
@@ -124,4 +124,4 @@ workflows:
       # least the smoke tests still pass.
       - test-llvm15-go119
       # This tests LLVM 19 support when linking against system libraries.
-      - test-llvm19-go123
+      - test-llvm19-go124
diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
index 07b0d307d..25b597178 100644
--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -39,7 +39,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v4
@@ -143,7 +143,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Build TinyGo (LLVM ${{ matrix.version }})
         run: go install -tags=llvm${{ matrix.version }}
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index c94b3582e..cbb0a7c55 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -18,7 +18,7 @@ jobs:
     # statically linked binary.
     runs-on: ubuntu-latest
     container:
-      image: golang:1.23-alpine
+      image: golang:1.24-alpine
     outputs:
       version: ${{ steps.version.outputs.version }}
     steps:
@@ -146,7 +146,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -189,7 +189,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Install Node.js
         uses: actions/setup-node@v4
@@ -315,7 +315,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v4
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index e1794ef13..42365f59b 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -41,7 +41,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Restore cached LLVM source
         uses: actions/cache/restore@v4
@@ -156,7 +156,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v4
@@ -186,7 +186,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v4
@@ -222,7 +222,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.24'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v4
diff --git a/Dockerfile b/Dockerfile
index 9a9effac2..520ad7c9b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.23 AS tinygo-llvm
+FROM golang:1.24 AS tinygo-llvm
 
 RUN apt-get update && \
     apt-get install -y apt-utils make cmake clang-15 ninja-build && \
@@ -33,7 +33,7 @@ RUN cd /tinygo/ && \
 
 # tinygo-compiler copies the compiler build over to a base Go container (without
 # all the build tools etc).
-FROM golang:1.23 AS tinygo-compiler
+FROM golang:1.24 AS tinygo-compiler
 
 # Copy tinygo build.
 COPY --from=tinygo-compiler-build /tinygo/build/release/tinygo /tinygo
diff --git a/GNUmakefile b/GNUmakefile
index 423a2a20e..28031ffec 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -309,11 +309,9 @@ TEST_PACKAGES_FAST = \
 	container/heap \
 	container/list \
 	container/ring \
-	crypto/des \
 	crypto/ecdsa \
 	crypto/elliptic \
 	crypto/md5 \
-	crypto/rc4 \
 	crypto/sha1 \
 	crypto/sha256 \
 	crypto/sha512 \
@@ -355,17 +353,11 @@ TEST_PACKAGES_FAST = \
 	unique \
 	$(nil)
 
-# Assume this will go away before Go2, so only check minor version.
-ifeq ($(filter $(shell $(GO) env GOVERSION | cut -f 2 -d.), 16 17 18), )
-TEST_PACKAGES_FAST += crypto/internal/nistec/fiat
-else
-TEST_PACKAGES_FAST += crypto/elliptic/internal/fiat
-endif
-
 # archive/zip requires os.ReadAt, which is not yet supported on windows
 # bytes requires mmap
 # compress/flate appears to hang on wasi
 # crypto/aes fails on wasi, needs panic()/recover()
+# crypto/des fails on wasi, needs panic()/recover()
 # crypto/hmac fails on wasi, it exits with a "slice out of range" panic
 # debug/plan9obj requires os.ReadAt, which is not yet supported on windows
 # image requires recover(), which is not yet supported on wasi
@@ -386,6 +378,7 @@ TEST_PACKAGES_LINUX := \
 	archive/zip \
 	compress/flate \
 	crypto/aes \
+	crypto/des \
 	crypto/hmac \
 	debug/dwarf \
 	debug/plan9obj \
@@ -405,10 +398,11 @@ TEST_PACKAGES_LINUX := \
 
 TEST_PACKAGES_DARWIN := $(TEST_PACKAGES_LINUX)
 
+# os/user requires t.Skip() support
 TEST_PACKAGES_WINDOWS := \
 	compress/flate \
+	crypto/des \
 	crypto/hmac \
-	os/user \
 	strconv \
 	text/template/parse \
 	$(nil)
diff --git a/builder/config.go b/builder/config.go
index d1d0a2713..b36b9333f 100644
--- a/builder/config.go
+++ b/builder/config.go
@@ -26,7 +26,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 
 	// Version range supported by TinyGo.
 	const minorMin = 19
-	const minorMax = 23
+	const minorMax = 24
 
 	// Check that we support this Go toolchain version.
 	gorootMajor, gorootMinor, err := goenv.GetGorootVersion()
@@ -36,7 +36,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
 		// Note: when this gets updated, also update the Go compatibility matrix:
 		// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
-		return nil, fmt.Errorf("requires go version 1.19 through 1.23, got go%d.%d", gorootMajor, gorootMinor)
+		return nil, fmt.Errorf("requires go version 1.%d through 1.%d, got go%d.%d", minorMin, minorMax, gorootMajor, gorootMinor)
 	}
 
 	// Check that the Go toolchain version isn't too new, if we haven't been
diff --git a/builder/sizes_test.go b/builder/sizes_test.go
index 2b2b08fe6..a96ce9e6f 100644
--- a/builder/sizes_test.go
+++ b/builder/sizes_test.go
@@ -44,7 +44,7 @@ func TestBinarySize(t *testing.T) {
 		// microcontrollers
 		{"hifive1b", "examples/echo", 4560, 280, 0, 2268},
 		{"microbit", "examples/serial", 2916, 388, 8, 2272},
-		{"wioterminal", "examples/pininterrupt", 7315, 1489, 116, 6912},
+		{"wioterminal", "examples/pininterrupt", 7359, 1489, 116, 6912},
 
 		// TODO: also check wasm. Right now this is difficult, because
 		// wasm binaries are run through wasm-opt and therefore the
diff --git a/compiler/alias.go b/compiler/alias.go
index b0191a7a1..9d57a587e 100644
--- a/compiler/alias.go
+++ b/compiler/alias.go
@@ -18,11 +18,12 @@ var stdlibAliases = map[string]string{
 	// crypto packages
 	"crypto/ed25519/internal/edwards25519/field.feMul": "crypto/ed25519/internal/edwards25519/field.feMulGeneric",
 	"crypto/internal/edwards25519/field.feSquare":      "crypto/ed25519/internal/edwards25519/field.feSquareGeneric",
-	"crypto/md5.block":         "crypto/md5.blockGeneric",
-	"crypto/sha1.block":        "crypto/sha1.blockGeneric",
-	"crypto/sha1.blockAMD64":   "crypto/sha1.blockGeneric",
-	"crypto/sha256.block":      "crypto/sha256.blockGeneric",
-	"crypto/sha512.blockAMD64": "crypto/sha512.blockGeneric",
+	"crypto/md5.block":           "crypto/md5.blockGeneric",
+	"crypto/sha1.block":          "crypto/sha1.blockGeneric",
+	"crypto/sha1.blockAMD64":     "crypto/sha1.blockGeneric",
+	"crypto/sha256.block":        "crypto/sha256.blockGeneric",
+	"crypto/sha512.blockAMD64":   "crypto/sha512.blockGeneric",
+	"internal/chacha8rand.block": "internal/chacha8rand.block_generic",
 
 	// AES
 	"crypto/aes.decryptBlockAsm": "crypto/aes.decryptBlock",
diff --git a/src/internal/abi/type.go b/src/internal/abi/type.go
new file mode 100644
index 000000000..d1853e0f3
--- /dev/null
+++ b/src/internal/abi/type.go
@@ -0,0 +1,7 @@
+package abi
+
+type Type struct {
+	// Intentionally left empty. TinyGo uses a different way to represent types,
+	// so this is unimplementable. The type definition here is purely for
+	// compatibility.
+}
diff --git a/src/reflect/value.go b/src/reflect/value.go
index 69b57fd1c..7ac71aa18 100644
--- a/src/reflect/value.go
+++ b/src/reflect/value.go
@@ -271,6 +271,10 @@ func (v Value) Comparable() bool {
 	}
 }
 
+func (v Value) Equal(u Value) bool {
+	panic("unimplemented: reflect.Value.Equal")
+}
+
 func (v Value) Addr() Value {
 	if !v.CanAddr() {
 		panic("reflect.Value.Addr of unaddressable value")
diff --git a/src/runtime/synctest.go b/src/runtime/synctest.go
new file mode 100644
index 000000000..fa11c991f
--- /dev/null
+++ b/src/runtime/synctest.go
@@ -0,0 +1,15 @@
+package runtime
+
+// Dummy implementation of synctest functions (we don't support synctest at the
+// moment).
+
+//go:linkname synctest_acquire internal/synctest.acquire
+func synctest_acquire() any {
+	// Dummy: we don't support synctest.
+	return nil
+}
+
+//go:linkname synctest_release internal/synctest.release
+func synctest_release(sg any) {
+	// Dummy: we don't support synctest.
+}
diff --git a/src/runtime/time.go b/src/runtime/time.go
index 50bf61cf3..3935b4486 100644
--- a/src/runtime/time.go
+++ b/src/runtime/time.go
@@ -1,5 +1,18 @@
 package runtime
 
+//go:linkname time_runtimeNano time.runtimeNano
+func time_runtimeNano() int64 {
+	// Note: we're ignoring sync groups here (package testing/synctest).
+	// See: https://github.com/golang/go/issues/67434
+	return nanotime()
+}
+
+//go:linkname time_runtimeNow time.runtimeNow
+func time_runtimeNow() (sec int64, nsec int32, mono int64) {
+	// Also ignoring the sync group here, like time_runtimeNano above.
+	return now()
+}
+
 // timerNode is an element in a linked list of timers.
 type timerNode struct {
 	next     *timerNode