diff --git a/crates/init/ls.rs b/crates/init/ls.rs
index bbbf4246..b9eeb192 100755
--- a/crates/init/ls.rs
+++ b/crates/init/ls.rs
@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
 #![doc = r##"<!-- Absolutely cursed hacks:
-SOURCE="$0" NAME=$(basename "$0" .rs) DIR=$(realpath $(dirname "$0"))
-exec "$(dirname "$0")/../ulib/compile.sh" "$0" <<END_MANIFEST
+NAME="$(basename "$0" .rs)"
+DIR=$(cd "$(dirname "$0")" && pwd -P)
+ULIB_DIR="$(git rev-parse --show-toplevel)/crates/ulib"
+exec "$ULIB_DIR/compile.sh" "$0" <<END_MANIFEST
 [package]
 name = "$NAME"
 version = "0.1.0"
@@ -12,7 +14,7 @@ name = "$NAME"
 path = "$DIR/$NAME.rs"
 
 [dependencies]
-ulib = { path = "$DIR/../ulib" }
+ulib = { path = "$ULIB_DIR" }
 
 [profile.standalone]
 inherits = "release"
diff --git a/crates/init/sharedMemTest.rs b/crates/init/sharedMemTest.rs
index 62d952a1..52ad8875 100755
--- a/crates/init/sharedMemTest.rs
+++ b/crates/init/sharedMemTest.rs
@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
 #![doc = r##"<!-- Absolutely cursed hacks:
-SOURCE="$0" NAME=$(basename "$0" .rs) DIR=$(realpath $(dirname "$0"))
-exec "$(dirname "$0")/../ulib/compile.sh" "$0" <<END_MANIFEST
+NAME="$(basename "$0" .rs)"
+DIR=$(cd "$(dirname "$0")" && pwd -P)
+ULIB_DIR="$(git rev-parse --show-toplevel)/crates/ulib"
+exec "$ULIB_DIR/compile.sh" "$0" <<END_MANIFEST
 [package]
 name = "$NAME"
 version = "0.1.0"
@@ -12,7 +14,7 @@ name = "$NAME"
 path = "$DIR/$NAME.rs"
 
 [dependencies]
-ulib = { path = "$DIR/../ulib" }
+ulib = { path = "$ULIB_DIR" }
 
 [profile.standalone]
 inherits = "release"
diff --git a/crates/init/shell.rs b/crates/init/shell.rs
index 7aff7345..6951d274 100755
--- a/crates/init/shell.rs
+++ b/crates/init/shell.rs
@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
 #![doc = r##"<!-- Absolutely cursed hacks:
-SOURCE="$0" NAME=$(basename "$0" .rs) DIR=$(realpath $(dirname "$0"))
-exec "$(dirname "$0")/../ulib/compile.sh" "$0" <<END_MANIFEST
+NAME="$(basename "$0" .rs)"
+DIR=$(cd "$(dirname "$0")" && pwd -P)
+ULIB_DIR="$(git rev-parse --show-toplevel)/crates/ulib"
+exec "$ULIB_DIR/compile.sh" "$0" <<END_MANIFEST
 [package]
 name = "$NAME"
 version = "0.1.0"
@@ -12,7 +14,7 @@ name = "$NAME"
 path = "$DIR/$NAME.rs"
 
 [dependencies]
-ulib = { path = "$DIR/../ulib" }
+ulib = { path = "$ULIB_DIR" }
 
 [profile.standalone]
 inherits = "release"
diff --git a/crates/ulib/compile.sh b/crates/ulib/compile.sh
index ef740b64..d3e2ec39 100755
--- a/crates/ulib/compile.sh
+++ b/crates/ulib/compile.sh
@@ -1,13 +1,14 @@
 #!/usr/bin/env bash
 
 set -e
-SOURCE=$(realpath "$1")
-NAME=$(basename "$SOURCE" .rs)
-RELATIVE=$(realpath --relative-to=. "$SOURCE" || echo "$SOURCE")
+ULIB_DIR=$(cd "$(dirname -- "$0")" && pwd -P)
+SOURCE_DIR=$(cd "$(dirname -- "$1")" && pwd -P)
+SOURCE="$SOURCE_DIR/$(basename -- "$1")"
+NAME=$(basename -- "$SOURCE" .rs)
 
 MANIFEST="$(cat)"
 
-LINKER_SCRIPT="$(dirname "$0")/script.ld"
+LINKER_SCRIPT="$ULIB_DIR/script.ld"
 
 TEMP_DIR="$(mktemp -d)"
 trap 'rm -rf -- "$TEMP_DIR"' EXIT
@@ -26,13 +27,20 @@ CARGO_TARGET_DIR="$TARGET_DIR" RUSTC_BOOTSTRAP=1 cargo rustc \
     -C link-arg=-T"${LINKER_SCRIPT}" -C link-args='-zmax-page-size=0x1000' \
 
 BIN_PATH="${TARGET_DIR}/aarch64-unknown-none-softfloat/standalone/${NAME}"
-cp "${BIN_PATH}" "${SOURCE%.rs}.elf"
-
-# TODO: macos doesn't support realpath --relative-to, stat -c
-SIZE=$(test -f "${SOURCE%.rs}.elf" && find "${SOURCE%.rs}.elf" -printf "%s")
-SIZE=$(echo "${SIZE}" | python3 -c \
-    "(lambda f:f(f,float(input()),0))\
-     (lambda f,i,j:print('%.4g'%i,'BKMGTPE'[j]+'iB' if j else 'bytes')\
-     if i<1024 else f(f,i/1024,j+1))"
-)
-echo "Built ${RELATIVE%.rs}.elf, file size ${SIZE}"
+ELF_FILE="${SOURCE%.rs}.elf"
+cp "${BIN_PATH}" "$ELF_FILE"
+
+if test -f "$ELF_FILE" ; then
+    # MacOS compat -- try everything, hope at least one works
+    SIZE=$(stat -c%s -- "$ELF_FILE" 2>/dev/null || stat -f%z -- "$ELF_FILE" 2>/dev/null || find "$ELF_FILE" -printf "%s")
+    SIZE=$(echo "${SIZE}" | python3 -c \
+        "(lambda f:f(f,float(input()),0))\
+        (lambda f,i,j:print('%.4g'%i,'BKMGTPE'[j]+'iB' if j else 'bytes')\
+        if i<1024 else f(f,i/1024,j+1))"
+    )
+    RELATIVE=$(realpath --relative-to=. -- "$SOURCE" || echo "$SOURCE")
+    echo "Built ${RELATIVE%.rs}.elf, file size ${SIZE}"
+else
+    echo "Failed to build $ELF_FILE?"
+    exit 1
+fi