diff --git a/home-manager/modules/npm-globals/install-npm-globals.sh b/home-manager/modules/npm-globals/install-npm-globals.sh
index 39f6607c3..f6fd22eed 100755
--- a/home-manager/modules/npm-globals/install-npm-globals.sh
+++ b/home-manager/modules/npm-globals/install-npm-globals.sh
@@ -115,6 +115,20 @@ missing_native_optional_dep() {
   [ "$matched" -eq 1 ] && [ "$present" -eq 0 ]
 }
 
+# Remove the npm "bun" wrapper package from global node_modules.
+# Some transitive deps pull in the "bun" npm package whose postinstall
+# downloads a bun binary. When that postinstall is skipped/fails, it leaves
+# a stub .bin/bun shim that shadows the real system bun, breaking every
+# subsequent postinstall that shells out to bun (e.g. @railway/cli).
+purge_bun_npm_shim() {
+  local gm="${HOME}/.bun/install/global/node_modules"
+  if [ -d "${gm}/bun" ]; then
+    rm -rf "${gm}/bun"
+    rm -f "${gm}/.bin/bun" "${gm}/.bin/bunx"
+    echo "Removed broken bun npm shim from global node_modules"
+  fi
+}
+
 echo "Installing npm global packages from package.json using bun..."
 cd "${HOME}/dotfiles"
 
@@ -154,6 +168,8 @@ if [ "${#STALE[@]}" -gt 0 ]; then
   done
 fi
 
+purge_bun_npm_shim
+
 # Build list of packages that need installing or updating
 GLOBAL_MODULES="${HOME}/.bun/install/global/node_modules"
 DEPS=$(jq -r '.dependencies | to_entries[] | "\(.key)=\(.value)"' "$PACKAGE_JSON" 2>/dev/null || true)
@@ -198,6 +214,7 @@ if [ "${#MISSING[@]}" -gt 0 ]; then
   echo "Installing ${#MISSING[@]} missing packages..."
   for dep in "${MISSING[@]}"; do
     timeout 600 bun add --global "$dep" 2>/dev/null || echo "Install failed: $dep"
+    purge_bun_npm_shim
   done
 else
   echo "All npm global packages already installed"
@@ -222,6 +239,7 @@ if [ -n "$OVERRIDES" ]; then
     jq --argjson overrides "$OVERRIDES" '.overrides = $overrides' "$GLOBAL_PKG" >"${GLOBAL_PKG}.tmp" &&
       mv "${GLOBAL_PKG}.tmp" "$GLOBAL_PKG"
     (cd "${HOME}/.bun/install/global" && bun install 2>/dev/null || true)
+    purge_bun_npm_shim
     echo "Applied dependency overrides to global install"
   fi
 fi
@@ -319,6 +337,7 @@ if [ -n "$OPTIONAL_DEPS" ]; then
     fi
     echo "Installing platform-native: $spec"
     timeout 600 bun add --global "$spec" --minimum-release-age 0 2>/dev/null || echo "Install failed: $spec"
+    purge_bun_npm_shim
     # Verify the payload actually materialized; bun can silently no-op.
     if [ ! -f "${GLOBAL_MODULES}/${dep}/package.json" ]; then
       echo "Warning: $dep still missing after install ($spec)" >&2
diff --git a/spec/npm_globals_spec.sh b/spec/npm_globals_spec.sh
index 9d5bd00c3..df3a9309c 100644
--- a/spec/npm_globals_spec.sh
+++ b/spec/npm_globals_spec.sh
@@ -187,6 +187,28 @@ The output should include 'find'
 End
 End
 
+Describe 'bun npm shim purge'
+  It 'defines a purge_bun_npm_shim function'
+    When run bash -c "grep 'purge_bun_npm_shim()' '$SCRIPT'"
+    The output should include 'purge_bun_npm_shim'
+  End
+
+  It 'removes the bun package from global node_modules'
+    When run bash -c "grep 'rm -rf.*gm.*bun' '$SCRIPT'"
+    The output should include 'bun'
+  End
+
+  It 'removes bun shims from .bin'
+    When run bash -c "grep 'rm -f.*\.bin/bun' '$SCRIPT'"
+    The output should include '.bin/bun'
+  End
+
+  It 'calls purge after each bun add --global'
+    When run bash -c "grep -A 1 'bun add --global.*dep.*2>/dev/null' '$SCRIPT' | grep 'purge_bun_npm_shim'"
+    The output should include 'purge_bun_npm_shim'
+  End
+End
+
 Describe 'native addon repair'
 It 'has a sqlite3 native binding repair step'
 When run bash -c "grep 'repair_sqlite3_native_binding' '$SCRIPT'"