diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
index 90d434a5..575408b2 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -188,7 +188,7 @@ libcamera_shader_headers = custom_target(
     'gen-shader-headers',
     input : [shader_files],
     output : 'glsl_shaders.h',
-    command : [gen_shader_headers, meson.project_source_root(), meson.project_build_root(), '@OUTPUT@', '@INPUT@'],
+    command : [gen_shader_headers, meson.project_source_root(), '@OUTPUT@', '@INPUT@'],
 )
 
 libcamera_internal_headers += libcamera_shader_headers
diff --git a/utils/gen-shader-headers.sh b/utils/gen-shader-headers.sh
index 81bf1584..92f6f818 100755
--- a/utils/gen-shader-headers.sh
+++ b/utils/gen-shader-headers.sh
@@ -3,14 +3,13 @@
 set -e
 
 usage() {
-	echo "Usage: $0 <src_dir> <build_dir> <output_header_name> <shader_file1> [shader_file2 ...]"
+	echo "Usage: $0 <src_dir> <output_header> <shader_file1> [shader_file2 ...]"
 	echo
 	echo "Generates a C header file containing hex-encoded shader data."
 	echo
 	echo "Arguments:"
 	echo "  src_dir             Path to the base of the source directory"
-	echo "  build_dir           Directory where shader files are located and header will be written"
-	echo "  output_header_name  Name of the generated header file (relative to build_dir)"
+	echo "  output_header       Path to the generated header file"
 	echo "  shader_file(s)      One or more shader files to embed in the header"
 	exit 1
 }
@@ -21,8 +20,7 @@ if [ $# -lt 4 ]; then
 fi
 
 src_dir="$1"; shift
-build_dir="$1"; shift
-build_path=$build_dir/"$1"; shift
+build_path="$1"; shift
 
 cat <<EOF > "$build_path"
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
@@ -40,7 +38,7 @@ cat <<EOF >> "$build_path"
 EOF
 
 for file in "$@"; do
-	name=$(basename "$build_dir/$file" | tr '.' '_')
+	name=$(basename "$file" | tr '.' '_')
 	echo "[SHADER-GEN] $name"
 	echo " * unsigned char $name;" >> "$build_path"
 done
@@ -49,7 +47,7 @@ echo "*/" >> "$build_path"
 
 echo "/* Hex encoded shader data */" >> "$build_path"
 for file in "$@"; do
-	name=$(basename "$build_dir/$file")
-	"$src_dir/utils/gen-shader-header.py" "$name" "$build_dir/$file" >> "$build_path"
+	name=$(basename "$file")
+	"$src_dir/utils/gen-shader-header.py" "$name" "$file" >> "$build_path"
 	echo >> "$build_path"
 done