diff --git osc/conf.py osc/conf.py
index 07dfc0b9..b2ee13eb 100644
--- osc/conf.py
+++ osc/conf.py
@@ -1250,10 +1250,7 @@ class Options(OscOptions):
     )  # type: ignore[assignment]
 
     build_cmd: str = Field(
-        default=
-            shutil.which("build", path="/usr/bin:/usr/lib/build:/usr/lib/obs-build")
-            or shutil.which("obs-build", path="/usr/bin:/usr/lib/build:/usr/lib/obs-build")
-            or "/usr/bin/build",
+        default="@@PREFIX@@/libexec/obs-build/build",
         description=textwrap.dedent(
             """
             Path to the 'build' tool.
@@ -1263,9 +1260,7 @@ class Options(OscOptions):
     )  # type: ignore[assignment]
 
     download_assets_cmd: str = Field(
-        default=
-            shutil.which("download_assets", path="/usr/lib/build:/usr/lib/obs-build")
-            or "/usr/lib/build/download_assets",
+        default="@@PREFIX@@/libexec/obs-build/download_assets",
         description=textwrap.dedent(
             """
             Path to the 'download_assets' tool used for downloading assets in SCM/Git based builds.
@@ -1275,7 +1270,7 @@ class Options(OscOptions):
     )  # type: ignore[assignment]
 
     vc_cmd: str = Field(
-        default=shutil.which("vc", path="/usr/lib/build:/usr/lib/obs-build") or "/usr/lib/build/vc",
+        default="@@PREFIX@@/libexec/obs-build/vc",
         description=textwrap.dedent(
             """
             Path to the 'vc' tool.