diff --git a/sim/Makefile b/sim/Makefile
index f2569cce..708608e5 100644
--- a/sim/Makefile
+++ b/sim/Makefile
@@ -24,7 +24,7 @@ PROJ_DIR     ?= $(PROJ_DIR_TMP)
 
 # select the core to use as main processor (defaults to Ibex)
 CORE     ?= ibex
-CORE_DIR := $(SIM_DIR)/../$(CORE)/
+CORE_DIR := $(SIM_DIR)../$(CORE)/
 
 # memory initialization files
 PROG_PATHS ?= progs.txt
@@ -48,7 +48,7 @@ all: verilator
 
 # vector coprocessor configuration file generation (defines VMEM_W and VREG_W)
 VPROC_CONFIG_PKG := $(PROJ_DIR)/vproc_config.sv
-include $(SIM_DIR)/../config.mk
+include $(SIM_DIR)../config.mk
 
 verilator-version-check:
 	@version=`verilator --version | awk '{print $$2}'`;                       \
@@ -66,7 +66,7 @@ verilator: verilator-version-check $(PROJ_DIR)/obj_dir/Vvproc_top.mk
 	    $(abspath $(TRACE_VCD)) $(abspath $(TRACE_FST))
 
 $(PROJ_DIR)/obj_dir/Vvproc_top.mk: verilator-version-check $(VPROC_CONFIG_PKG)
-	cp $(SIM_DIR)/verilator_main.cpp $(PROJ_DIR)/
+	cp $(SIM_DIR)verilator_main.cpp $(PROJ_DIR)/
 	cd $(PROJ_DIR);                                                           \
 	options="";                                                               \
 	cflags="";                                                                \
@@ -105,7 +105,7 @@ $(PROJ_DIR)/obj_dir/Vvproc_top.mk: verilator-version-check $(VPROC_CONFIG_PKG)
 	    -Wno-UNSIGNED -Wno-IMPLICIT -Wno-LITENDIAN -Wno-CASEINCOMPLETE        \
 	    -Wno-SYMRSVDWORD -Wno-BLKANDNBLK -Wno-BLKSEQ -Wno-SYNCASYNCNET        \
 	    -Wno-COMBDLY                                                          \
-	    -I$(SIM_DIR)/../rtl/ -I$(SIM_DIR)/../sva/ $$inc $$core                \
+	    -I$(SIM_DIR)../rtl/ -I$(SIM_DIR)../sva/ $$inc $$core                \
 	    -GMEM_W=$(MEM_W) -GVMEM_W=$(VMEM_W)                                   \
 	    -GICACHE_SZ=$(ICACHE_SZ) -GICACHE_LINE_W=$(ICACHE_LINE_W)             \
 	    -GDCACHE_SZ=$(DCACHE_SZ) -GDCACHE_LINE_W=$(DCACHE_LINE_W)             \
@@ -115,7 +115,7 @@ $(PROJ_DIR)/obj_dir/Vvproc_top.mk: verilator-version-check $(VPROC_CONFIG_PKG)
 
 vivado: $(VPROC_CONFIG_PKG)
 	cd $(PROJ_DIR) && vivado -mode batch -source $(VIVADO_TCL)                \
-	    -tclargs $(SIM_DIR)/../ $(CORE_DIR) $(VPROC_CONFIG_PKG)               \
+	    -tclargs $(SIM_DIR)../ $(CORE_DIR) $(VPROC_CONFIG_PKG)               \
 	    "MEM_W=$(MEM_W) MEM_SZ=$(MEM_SZ) MEM_LATENCY=$(MEM_LATENCY)           \
 	    VMEM_W=$(VMEM_W)                                                      \
 	    ICACHE_SZ=$(ICACHE_SZ) ICACHE_LINE_W=$(ICACHE_LINE_W)                 \
diff --git a/sw/Makefile b/sw/Makefile
index d3280ce6..a68dfad3 100644
--- a/sw/Makefile
+++ b/sw/Makefile
@@ -14,7 +14,7 @@ ifeq ($(COMPILER),gcc)
     RISCV_DUMP          := riscv32-unknown-elf-objdump
     RISCV_OBCP          := riscv32-unknown-elf-objcopy
     ARCH                := rv32imv
-    LD_SCRIPT           := $(SW_DIR)/link.ld
+    LD_SCRIPT           := $(SW_DIR)link.ld
 else ifeq ($(COMPILER),llvm)
     # Pick the first clang executable in $PATH with version >= 14, or the
     # default clang if there is no clang >= 14; the individual steps are:
@@ -32,7 +32,7 @@ else ifeq ($(COMPILER),llvm)
     RISCV_OBCP          := llvm-objcopy
     ARCH                := rv32imzve32x
     CC_SPECIFIC_OPTIONS := -fuse-ld=lld -Wno-unused-command-line-argument
-    LD_SCRIPT           := $(SW_DIR)/lld_link.ld
+    LD_SCRIPT           := $(SW_DIR)lld_link.ld
 endif
 
 
@@ -40,13 +40,13 @@ RISCV_FLAGS := -march=$(ARCH) -mabi=ilp32 -static -mcmodel=medany             \
                -fvisibility=hidden -nostdlib -nostartfiles -Wall              \
                $(CC_SPECIFIC_OPTIONS)
 
-CFLAGS := $(CFLAGS) -I$(SW_DIR)/lib/
+CFLAGS := $(CFLAGS) -I$(SW_DIR)lib/
 
 PROG ?= test
 OBJ  ?= test.o
 
 # add crt0 to object files
-RISCV_OBJ := $(SW_DIR)/crt0.o $(OBJ) $(SW_DIR)/lib/uart.o
+RISCV_OBJ := $(SW_DIR)crt0.o $(OBJ) $(SW_DIR)lib/uart.o
 
 all: $(PROG).vmem
 
@@ -77,4 +77,4 @@ $(PROG).elf: $(RISCV_OBJ) $(LD_SCRIPT)
 clean:
 	rm -f *.o *.elf *.bin *.vmem
 
-include $(SW_DIR)/toolchain.mk
+include $(SW_DIR)toolchain.mk