diff --git a/cmd/extract_linker/main.go b/cmd/extract_linker/main.go
index 8530b4a..3f24ab2 100644
--- a/cmd/extract_linker/main.go
+++ b/cmd/extract_linker/main.go
@@ -68,7 +68,7 @@
 
 	ef, err := elf.NewFile(f)
 	if err != nil {
-		log.Fatal("Unable to read elf file: %v", err)
+		log.Fatalf("Unable to read elf file: %v", err)
 	}
 
 	asm := &bytes.Buffer{}
@@ -123,17 +123,17 @@
 
 	if asmPath != "" {
 		if err := ioutil.WriteFile(asmPath, asm.Bytes(), 0777); err != nil {
-			log.Fatal("Unable to write %q: %v", asmPath, err)
+			log.Fatalf("Unable to write %q: %v", asmPath, err)
 		}
 	}
 
 	if scriptPath != "" {
 		buf := &bytes.Buffer{}
 		if err := linkerScriptTemplate.Execute(buf, sections); err != nil {
-			log.Fatal("Failed to create linker script: %v", err)
+			log.Fatalf("Failed to create linker script: %v", err)
 		}
 		if err := ioutil.WriteFile(scriptPath, buf.Bytes(), 0777); err != nil {
-			log.Fatal("Unable to write %q: %v", scriptPath, err)
+			log.Fatalf("Unable to write %q: %v", scriptPath, err)
 		}
 	}
 }
diff --git a/cmd/pom2mk/pom2mk.go b/cmd/pom2mk/pom2mk.go
index bf47896..4fc484c 100644
--- a/cmd/pom2mk/pom2mk.go
+++ b/cmd/pom2mk/pom2mk.go
@@ -305,7 +305,7 @@
 	dir := flag.Arg(0)
 	absDir, err := filepath.Abs(dir)
 	if err != nil {
-		fmt.Println(os.Stderr, "Failed to get absolute directory:", err)
+		fmt.Fprintln(os.Stderr, "Failed to get absolute directory:", err)
 		os.Exit(1)
 	}
 
diff --git a/cmd/zipsync/zipsync.go b/cmd/zipsync/zipsync.go
index ed8a06f..ea755f5 100644
--- a/cmd/zipsync/zipsync.go
+++ b/cmd/zipsync/zipsync.go
@@ -93,11 +93,11 @@
 				}
 			}
 			if filepath.IsAbs(f.Name) {
-				log.Fatal("%q in %q is an absolute path", f.Name, input)
+				log.Fatalf("%q in %q is an absolute path", f.Name, input)
 			}
 
 			if prev, exists := seen[f.Name]; exists {
-				log.Fatal("%q found in both %q and %q", f.Name, prev, input)
+				log.Fatalf("%q found in both %q and %q", f.Name, prev, input)
 			}
 			seen[f.Name] = input