diff --git a/src/Backend/Compiler.ts b/src/Backend/Compiler.ts
index 9af37e51..b7625207 100644
--- a/src/Backend/Compiler.ts
+++ b/src/Backend/Compiler.ts
@@ -77,11 +77,11 @@ class CompilerBase implements Compiler {
     throw Error('Invalid getToolchainTypes call');
   }
 
-  getToolchains(toolchainType: string, start: number, count: number): Toolchains {
+  getToolchains(_toolchainType: string, _start: number, _count: number): Toolchains {
     throw Error('Invalid getToolchains call');
   }
 
-  getInstalledToolchains(toolchainType: string): Toolchains {
+  getInstalledToolchains(_toolchainType: string): Toolchains {
     throw Error('Invalid getInstalledToolchains call');
   }
 
diff --git a/src/Backend/Toolchain.ts b/src/Backend/Toolchain.ts
index 006f25a5..bc86200c 100644
--- a/src/Backend/Toolchain.ts
+++ b/src/Backend/Toolchain.ts
@@ -58,7 +58,7 @@ class Toolchain {
   installed(): Command {
     throw Error('Invalid installed call');
   }
-  run(cfg: string): Command {
+  run(_cfg: string): Command {
     throw Error('Invalid run call');
   }
 }