diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c4507069..37d5271b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,7 +46,13 @@ jobs:
 
       - name: Install xlings and mcpp
         run: |
-          curl -fsSL https://raw.githubusercontent.com/openxlings/xlings/main/tools/other/quick_install.sh \
+          # --retry-all-errors and not --retry alone: the first covers a
+          # transient HTTP status and a timeout, and what this step meets is a
+          # failure of the transport. Observed in this ecosystem as
+          # `curl: (35) Recv failure: Connection reset by peer', thirteen
+          # seconds into a job, before anything was built.
+          curl -fsSL --retry 3 --retry-all-errors --retry-delay 2 \
+            https://raw.githubusercontent.com/openxlings/xlings/main/tools/other/quick_install.sh \
             | bash -s "$XLINGS_VERSION"
           echo "$HOME/.xlings/subos/current/bin" >> "$GITHUB_PATH"
 
@@ -464,7 +470,13 @@ jobs:
       - name: Install xlings (Unix)
         if: runner.os != 'Windows'
         run: |
-          curl -fsSL https://raw.githubusercontent.com/openxlings/xlings/main/tools/other/quick_install.sh \
+          # --retry-all-errors and not --retry alone: the first covers a
+          # transient HTTP status and a timeout, and what this step meets is a
+          # failure of the transport. Observed in this ecosystem as
+          # `curl: (35) Recv failure: Connection reset by peer', thirteen
+          # seconds into a job, before anything was built.
+          curl -fsSL --retry 3 --retry-all-errors --retry-delay 2 \
+            https://raw.githubusercontent.com/openxlings/xlings/main/tools/other/quick_install.sh \
             | bash -s "$XLINGS_VERSION"
           echo "$HOME/.xlings/subos/current/bin" >> "$GITHUB_PATH"
 
diff --git a/README.md b/README.md
index 2e159ef7..078a1c19 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ C library.
 
 ```toml
 [dependencies]
-openkal-llvm-runtime = "0.4.0"
+openkal-llvm-runtime = "0.5.0"
 ```
 
 A C++ standard library is not portable in the way a program is. It is
diff --git a/mcpp.toml b/mcpp.toml
index fb552c9e..b809ec10 100644
--- a/mcpp.toml
+++ b/mcpp.toml
@@ -1,7 +1,7 @@
 [package]
 namespace   = "mcpplibs"
 name        = "openkal-llvm-runtime"
-version     = "0.4.0"
+version     = "0.5.0"
 description = "LLVM's C++ runtime libraries — libc++, libc++abi and libunwind — configured for openkal-musl rather than for a host C library."
 license     = "Apache-2.0"
 authors     = ["mcpplibs"]
@@ -208,7 +208,7 @@ sources = [
 cflags = ["-DDISABLE_AARCH64_FMV=1"]
 
 [dependencies]
-openkal-musl = "0.7.0"
+openkal-musl = "0.9.0"
 
 [build]
 cxx_standard = "c++23"