diff --git a/animation/bresenham.c b/animation/bresenham.c
deleted file mode 100644
index b61148b..0000000
--- a/animation/bresenham.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#include <stdlib.h>
-
-void bresenham_time(int t1, int y1, int t2, int y2) {
-    int dt = t2 - t1;
-    int dy = y2 - y1;
-    int m = 2 * dy;
-    int err = 0;
-
-    if (m > 0) {
-        err = m - dt;
-    } else if (m < 0) {
-        err = m + dt;
-    }
-    for (int t = t1, y = y1; t <= t2; t++) {
-        printf("(%d, %d) [%d]\n", t, y, err);
-
-        err += m;
-
-        if (m > 0) {
-            if (err >= 0) {
-                y++;
-                err -= 2 * dt;
-            }
-        } else if (m < 0) {
-            if (err <= 0) {
-                y--;
-                err += 2 * dt;
-            }
-        }
-    }
-}
-
diff --git a/animation/main.c b/animation/main.c
deleted file mode 100644
index c85db9e..0000000
--- a/animation/main.c
+++ /dev/null
@@ -1,36 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-#include <animation.h>
-
-int main (void) {
-    {
-        time_line_t line = time_line_new(0, 0, 15, 10);
-        time_line_print(&line);
-        for (int i = 0; i < 15; i++) {
-            time_line_next(&line);
-            time_line_print(&line);
-        }
-    }
-
-    printf("\n");
-
-    {
-        time_line_t line = time_line_new(0, 0, 15, 25);
-        time_line_print(&line);
-        for (int i = 0; i < 15; i++) {
-            time_line_next(&line);
-            time_line_print(&line);
-        }
-    }
-
-    printf("\n");
-
-    {
-        time_line_t line = time_line_new(0, 0, 10, 255);
-        time_line_print(&line);
-        for (int i = 0; i < 10; i++) {
-            time_line_next(&line);
-            time_line_print(&line);
-        }
-    }
-}
diff --git a/base/base.h b/base/base.h
index 7baab60..3ec4394 100644
--- a/base/base.h
+++ b/base/base.h
@@ -1,58 +1,9 @@
-/*
-Copyright 2022, Savanni D'Gerinel <savanni@luminescent-dreams.com>
 
-This file is part of Savanni's AVR library.
-
-Lumeto is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
-
-Lumeto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
-*/
-
-#ifndef __BASE_H__
-#define __BASE_H__
-
-#include <avr/io.h>
+#include <stdint.h>
 #include <stdbool.h>
-#include <util/delay.h>
 
-#define LINE_OUT 1
-#define LINE_IN  0
+#ifdef AVR
 
-typedef struct DIO {
-    volatile uint8_t *ddr;
-    volatile uint8_t *port;
-    volatile uint8_t *pin;
-    uint8_t addr;
-} dio_t;
-
-/*
-#define DIO(addr) (dio_t){ .ddr = &DDRA, .port = &PORTA, .addr = addr }
-#define DIO(addr) (dio_t){ .ddr = &DDRB, .port = &PORTB, .addr = addr }
-#define DIO(addr) (dio_t){ .ddr = &DDRC, .port = &PORTC, .addr = addr }
-#define DIO(addr) (dio_t){ .ddr = &DDRD, .port = &PORTD, .addr = addr }
-*/
-
-inline void dio_set_direction(dio_t *line, int direction) {
-    if (direction == LINE_OUT) {
-        *(line->ddr) |= _BV(line->addr);
-    } else {
-        *(line->ddr) &= ~(_BV(line->addr));
-    }
-}
-
-inline void dio_set(dio_t *line, bool value) {
-    if (value) {
-        *(line->port) |= _BV(line->addr);
-    }
-    else {
-        *(line->port) &= ~(_BV(line->addr));
-    }
-}
-
-inline int dio_read(dio_t *line) {
-    return (*(line->pin) & _BV(line->addr)) > 0;
-}
+#else
 
 #endif
diff --git a/dio/dio.h b/dio/dio.h
new file mode 100644
index 0000000..7baab60
--- /dev/null
+++ b/dio/dio.h
@@ -0,0 +1,58 @@
+/*
+Copyright 2022, Savanni D'Gerinel <savanni@luminescent-dreams.com>
+
+This file is part of Savanni's AVR library.
+
+Lumeto is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+Lumeto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef __BASE_H__
+#define __BASE_H__
+
+#include <avr/io.h>
+#include <stdbool.h>
+#include <util/delay.h>
+
+#define LINE_OUT 1
+#define LINE_IN  0
+
+typedef struct DIO {
+    volatile uint8_t *ddr;
+    volatile uint8_t *port;
+    volatile uint8_t *pin;
+    uint8_t addr;
+} dio_t;
+
+/*
+#define DIO(addr) (dio_t){ .ddr = &DDRA, .port = &PORTA, .addr = addr }
+#define DIO(addr) (dio_t){ .ddr = &DDRB, .port = &PORTB, .addr = addr }
+#define DIO(addr) (dio_t){ .ddr = &DDRC, .port = &PORTC, .addr = addr }
+#define DIO(addr) (dio_t){ .ddr = &DDRD, .port = &PORTD, .addr = addr }
+*/
+
+inline void dio_set_direction(dio_t *line, int direction) {
+    if (direction == LINE_OUT) {
+        *(line->ddr) |= _BV(line->addr);
+    } else {
+        *(line->ddr) &= ~(_BV(line->addr));
+    }
+}
+
+inline void dio_set(dio_t *line, bool value) {
+    if (value) {
+        *(line->port) |= _BV(line->addr);
+    }
+    else {
+        *(line->port) &= ~(_BV(line->addr));
+    }
+}
+
+inline int dio_read(dio_t *line) {
+    return (*(line->pin) & _BV(line->addr)) > 0;
+}
+
+#endif
diff --git a/display/display.c b/display/display.c
index 54195c1..acd851a 100644
--- a/display/display.c
+++ b/display/display.c
@@ -10,7 +10,7 @@ Lumeto is distributed in the hope that it will be useful, but WITHOUT ANY WARRAN
 You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
 */
 
-#include <base.h>
+#include <dio.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <util/delay.h>
diff --git a/flake.nix b/flake.nix
index 523269d..6fe0f13 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,6 +14,38 @@
       attiny85 = { mcu = "attiny85"; chip_select = "AVR_ATtiny85"; f_cpu = "8000000"; };
       atmega32u4 = { mcu = "atmega32u4"; chip_select = "AVR_ATmega32u4"; f_cpu = "8000000"; };
       processor = atmega32u4;
+
+      mkLibrary = { pkgs, gcc, cflags, pname, psrc, pbuildInputs ? [] }:
+      pkgs.stdenv.mkDerivation rec {
+        name = pname;
+        src = psrc;
+
+        buildInputs = pbuildInputs;
+
+        include_dirs = pkgs.lib.concatStringsSep " " (map (dir: "-I${dir}/include") buildInputs);
+        object_files = pkgs.lib.concatStringsSep " " (map (dir: "${dir}/*.o") buildInputs);
+
+        dontUnpack = true;
+        dontConfigure = true;
+
+        buildPhase = ''
+          set -x
+          for source in ${src}/*.c; do
+              if [ -e $source ]; then
+                  ${gcc}/bin/gcc ${cflags} ${include_dirs} -c $source
+              fi
+          done
+          cp ${src}/*.h .
+          '';
+
+        installPhase = ''
+          mkdir -p $out/include $out/lib
+          cp *.h $out/include || true
+          cp *.o $out/lib || true
+          '';
+      };
+
+
     in rec
     {
       defaultPackage."x86_64-linux" = 
@@ -29,25 +61,64 @@
           ];
         };
 
-      packages."x86_64-linux"."base-attiny85" = (packages."x86_64-linux"."base" attiny85);
+      packages."x86_64-linux"."dio-attiny85" = (packages."x86_64-linux"."dio" attiny85);
 
-      packages."x86_64-linux"."base" =
+      /*
+      packages."x86_64-linux"."dio" =
+        let
+          pkgs = import nixpkgs { system = "x86_64-linux"; };
+        in mkLibrary {
+          mkDerivation = pkgs.stdenv.mkDerivation;
+          gcc =
+          cflags = 
+          name =
+      */
+
+
+      /*
+      packages."x86_64-linux"."dio" =
         { mcu, chip_select, f_cpu }:
         let
           pkgs = import nixpkgs { system = "x86_64-linux"; };
           avr = pkgs.pkgsCross.avr.buildPackages;
         in pkgs.stdenv.mkDerivation rec {
-          name = "base";
+          name = "dio";
           src = ./.;
 
           CFLAGS = cflags { inherit mcu chip_select f_cpu; };
 
           installPhase = ''
             mkdir $out
-            cp base/base.h $out/
+            cp dio/dio.h $out/
             '';
         };
+        */
 
+      packages."x86_64-linux"."base" =
+        let
+          pkgs = import nixpkgs { system = "x86_64-linux"; };
+        in mkLibrary {
+          pkgs = pkgs;
+          gcc = pkgs.gcc;
+          cflags = "-Werror -Wall";
+          pname = "base";
+          psrc = ./base;
+          pbuildInputs = [ ];
+        };
+
+      packages."x86_64-linux"."rng" =
+        let
+          pkgs = import nixpkgs { system = "x86_64-linux"; };
+        in mkLibrary {
+          pkgs = pkgs;
+          gcc = pkgs.gcc;
+          cflags = "-Werror -Wall";
+          pname = "rng";
+          psrc = ./rng;
+          pbuildInputs = [ packages."x86_64-linux"."base" ];
+        };
+
+        /*
       packages."x86_64-linux"."rng" =
         { mcu, chip_select, f_cpu }:
         let
@@ -58,7 +129,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
           ];
 
           CFLAGS = cflags { inherit mcu chip_select f_cpu; };
@@ -74,25 +145,17 @@
             cp rng/rng.h rng.o $out/
             '';
         };
+        */
 
       packages."x86_64-linux"."animation" =
-        { gcc, mcu, chip_select, f_cpu }:
         let
           pkgs = import nixpkgs { system = "x86_64-linux"; };
-        in pkgs.stdenv.mkDerivation rec {
-          name = "animation";
-          src = ./.;
-
-          # CFLAGS = cflags { inherit mcu chip_select f_cpu; };
-
-          buildPhase = ''
-            ${gcc} -o animation.o -c ${src}/animation/animation.c
-            '';
-
-          installPhase = ''
-            mkdir $out
-            cp animation/animation.h animation.o $out/
-            '';
+        in mkLibrary {
+          pkgs = pkgs;
+          gcc = pkgs.gcc;
+          cflags = "-Werror -Wall";
+          pname = "animation";
+          psrc = ./animation;
         };
 
       packages."x86_64-linux"."animation-test" =
@@ -131,7 +194,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
           ];
 
           CFLAGS = cflags { inherit mcu chip_select f_cpu; };
@@ -157,7 +220,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
           ];
 
           CFLAGS = cflags { inherit mcu chip_select f_cpu; };
@@ -183,7 +246,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
           ];
 
           CFLAGS = cflags { inherit mcu chip_select f_cpu; };
@@ -209,7 +272,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."spi" { inherit mcu chip_select f_cpu; })
           ];
 
@@ -236,7 +299,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."shift-register" { inherit mcu chip_select f_cpu; })
           ];
 
@@ -264,7 +327,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."sk9822" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."rng" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."animation" { inherit mcu chip_select f_cpu;
@@ -297,7 +360,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."spi" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."shift-register" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."rfm" { inherit mcu chip_select f_cpu; })
@@ -332,7 +395,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."spi" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."shift-register" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."rfm" { inherit mcu chip_select f_cpu; })
@@ -367,7 +430,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."shift-register" { inherit mcu chip_select f_cpu; })
             (packages."x86_64-linux"."display" { inherit mcu chip_select f_cpu; })
           ];
@@ -400,7 +463,7 @@
           src = ./.;
 
           buildInputs = [
-            (packages."x86_64-linux"."base" { inherit mcu chip_select f_cpu; })
+            (packages."x86_64-linux"."dio" { inherit mcu chip_select f_cpu; })
           ];
 
           CFLAGS = cflags { inherit mcu chip_select f_cpu; };
diff --git a/flame/main.c b/flame/main.c
index 6ca584c..d15d79d 100644
--- a/flame/main.c
+++ b/flame/main.c
@@ -1,7 +1,7 @@
 #include <avr/io.h>
 #include <util/delay.h>
 
-#include <base.h>
+#include <dio.h>
 #include <sk9822.h>
 #include <rng.h>
 #include <animation.h>
diff --git a/interrupts/main.c b/interrupts/main.c
index ea384e8..76ba7be 100644
--- a/interrupts/main.c
+++ b/interrupts/main.c
@@ -1,4 +1,4 @@
-#include <base.h>
+#include <dio.h>
 #include <display.h>
 #include <stdbool.h>
 #include <stdio.h>
diff --git a/morse/morse.c b/morse/morse.c
index 30aa52c..8a85551 100644
--- a/morse/morse.c
+++ b/morse/morse.c
@@ -72,29 +72,29 @@ const struct morse_codepoint * morse_lookup(char val) {
     return &MORSE[idx];
 }
 
-void send_codepoint(gpio_t *gpio, const struct morse_codepoint *codepoint) {
-    const uint8_t one = 1 << gpio->addr;
+void send_codepoint(dio_t *dio, const struct morse_codepoint *codepoint) {
+    const uint8_t one = 1 << dio->addr;
     for (size_t i = 0; i < codepoint->length; i++) {
-        *gpio->port = *(gpio->port) | one;
+        *dio->port = *(dio->port) | one;
         if (codepoint->values[i] == DOT) {
             _delay_ms(DOT * SCALE);
         } else {
             _delay_ms(DASH * SCALE);
         }
-        *gpio->port = *(gpio->port) & ~one;
+        *dio->port = *(dio->port) & ~one;
         _delay_ms(DIVIDER * SCALE);
     }
     _delay_ms(INTERCHAR * SCALE);
 }
 
-void send_morse(gpio_t *gpio, char *message) {
+void send_morse(dio_t *dio, char *message) {
     for (size_t i = 0; i < strlen(message); i++) {
         if (message[i] == ' ') {
             _delay_ms(INTERWORD * SCALE);
         }
         const struct morse_codepoint *codepoint = morse_lookup(message[i]);
         if (codepoint != NULL) {
-            send_codepoint(gpio, codepoint);
+            send_codepoint(dio, codepoint);
         }
     }
 }
diff --git a/morse/morse.h b/morse/morse.h
index af437ec..6ced39d 100644
--- a/morse/morse.h
+++ b/morse/morse.h
@@ -16,7 +16,7 @@ You should have received a copy of the GNU General Public License along with Lum
 
 #include <stdint.h>
 #include <stdlib.h>
-#include <base.h>
+#include <dio.h>
 
 /* TODO: make this parameterizable */
 #define DOT 1
@@ -26,6 +26,6 @@ You should have received a copy of the GNU General Public License along with Lum
 #define INTERWORD 4
 #define SCALE 100
 
-void send_morse(gpio_t *gpio, char *message);
+void send_morse(dio_t *dio, char *message);
 
 #endif
diff --git a/power-management/main.c b/power-management/main.c
index ec56e57..12a66b7 100644
--- a/power-management/main.c
+++ b/power-management/main.c
@@ -1,4 +1,4 @@
-#include <base.h>
+#include <dio.h>
 
 #define TIMEOUT 1
 
diff --git a/prime-tx/main.c b/prime-tx/main.c
index 76d921c..6005bbe 100644
--- a/prime-tx/main.c
+++ b/prime-tx/main.c
@@ -1,5 +1,5 @@
 #include <avr/io.h>
-#include <base.h>
+#include <dio.h>
 #include <display.h>
 #include <rfm.h>
 #include <spi.h>
diff --git a/radio-rx/main.c b/radio-rx/main.c
index 02db2fd..414b97e 100644
--- a/radio-rx/main.c
+++ b/radio-rx/main.c
@@ -1,5 +1,5 @@
 #include <avr/io.h>
-#include <base.h>
+#include <dio.h>
 #include <display.h>
 #include <rfm.h>
 #include <spi.h>
diff --git a/rfm69hcw/rfm.h b/rfm69hcw/rfm.h
index d786627..2b99ee6 100644
--- a/rfm69hcw/rfm.h
+++ b/rfm69hcw/rfm.h
@@ -13,7 +13,7 @@ You should have received a copy of the GNU General Public License along with Lum
 #ifndef __RFM_H__
 #define __RFM_H__
 
-#include <base.h>
+#include <dio.h>
 #include <spi.h>
 #include <stdbool.h>
 
diff --git a/rng/rng.h b/rng/rng.h
index c98e374..7873205 100644
--- a/rng/rng.h
+++ b/rng/rng.h
@@ -1,5 +1,4 @@
 #include <base.h>
-#include <stdlib.h>
 
 #ifndef __RNG_H__
 #define __RNG_H__
diff --git a/shift_register/shift_register.c b/shift_register/shift_register.c
index ce99177..508b886 100644
--- a/shift_register/shift_register.c
+++ b/shift_register/shift_register.c
@@ -11,7 +11,7 @@ You should have received a copy of the GNU General Public License along with Lum
 */
 
 #include <util/delay.h>
-#include <base.h>
+#include <dio.h>
 #include "shift_register.h"
 
 void sr_strobe_line(dio_t *line) {
diff --git a/shift_register/shift_register.h b/shift_register/shift_register.h
index e257d90..b7a6372 100644
--- a/shift_register/shift_register.h
+++ b/shift_register/shift_register.h
@@ -14,7 +14,7 @@ You should have received a copy of the GNU General Public License along with Lum
 #ifndef __REG_H__
 #define __REG_H__
 
-#include <base.h>
+#include <dio.h>
 
 typedef struct SHIFT_REGISTER {
     dio_t output;
diff --git a/sk9822/sk9822.h b/sk9822/sk9822.h
index 9313dd0..67e18c2 100644
--- a/sk9822/sk9822.h
+++ b/sk9822/sk9822.h
@@ -11,7 +11,7 @@ You should have received a copy of the GNU General Public License along with Lum
 */
 
 #include <avr/io.h>
-#include <base.h>
+#include <dio.h>
 
 #ifndef __SK9822_H__
 #define __SK9822_H__
diff --git a/spi/spi.h b/spi/spi.h
index ea49e7e..5574dfd 100644
--- a/spi/spi.h
+++ b/spi/spi.h
@@ -14,7 +14,7 @@ You should have received a copy of the GNU General Public License along with Lum
 #ifndef __MORSE_H__
 #define __MORSE_H__
 
-#include <base.h>
+#include <dio.h>
 #include <stdlib.h>
 
 typedef struct SPI {